Explanation
The image shows basic architectural concepts based on the ISO/IEC/IEEE 42010 standard, which defines an architecture description as a work product used to express an architecture1 According to this standard, an architecture description consists of one or more architecture views, which are representations of the system of interest from the perspective of one or more stakeholders and their concerns2 An architecture view conforms to an architecture viewpoint, which establishes the conventions for constructing, interpreting, and analyzing the view to address the concerns of the stakeholders3 An architecture viewpoint may also define model kinds, which are kinds of models used to express the view.
In the context of the TOGAF standard, a candidate architecture is a possible architecture that addresses some or all of the requirements and concerns of the stakeholders. A trade-off is a decision outcome that balances and reconciles multiple, often conflicting, factors, such as costs, benefits, risks, and opportunities. In the process of developing an architecture, the architect may have to evaluate and compare different candidate architectures and make trade-offs among them to select the most suitable one.
Therefore, the items A and B in the image are candidate architecture and trade-off, respectively, as they represent the concepts of possible solutions and decision outcomes that are relevant to the architecture development process.
References: 1: ISO/IEC/IEEE 42010:2011, Systems and software engineering - Architecture description, Clause 3.4 2: ISO/IEC/IEEE 42010:2011, Systems and software engineering - Architecture description, Clause 3.5 3: ISO/IEC/IEEE 42010:2011, Systems and software engineering - Architecture description, Clause 3.6 : ISO/IEC/IEEE 42010:2011, Systems and software engineering - Architecture description, Clause 3.8 : The TOGAF Standard, Version 9.2, Part III: ADM Guidelines and Techniques, Chapter 28:
Architecture Content Framework : The TOGAF Standard, Version 9.2, Part III: ADM Guidelines and Techniques, Chapter 30: Trade-Off Analysis

Explanation
According to the TOGAF standard, the objectives of each ADM phase are as follows1:
*Phase E: Opportunities and Solutions
oDetermine whether an incremental approach is required, and if so identify Transition Architectures that will deliver continuous business value oIdentify and group major work packages within the Architecture Roadmap oIdentify and group major implementation projects to realize the Architecture Roadmap oIdentify dependencies between increments and projects oEstimate cost, benefit, and risk at a high level for each increment and project oConduct initial prioritization and sequencing of the Architecture Roadmap and projects
*Phase F: Migration Planning
oGenerate the initial complete version of the Architecture Roadmap, based upon the gap analysis and candidate Architecture Roadmap components from Phases B, C, and D oConfirm the Transition Architectures with relevant stakeholders oCreate the Implementation and Migration Plan, including Transition Architectures, work packages, projects, and other activities oConfirm and agree the Architecture Roadmap and Implementation and Migration Plan with relevant stakeholders
*Phase G: Implementation Governance
oFinalize the Architecture Roadmap and the supporting Implementation and Migration Plan oEnsure conformance with the Target Architecture by implementation projects oPerform appropriate Architecture Governance functions for the solution and any implementation-driven architecture Change Requests oEnsure that the architecture lifecycle is maintained oEnsure that the Architecture Governance Framework is executed
*Phase H: Architecture Change Management
oEnsure that the business value and cost of work packages and Transition Architectures is understood by key stakeholders oManage risks and issues related to the Architecture Roadmap and Implementation and Migration Plan oMonitor the implementation projects and Transition Architectures oManage changes to the architecture baseline oManage changes to the Architecture Capability Therefore, the correct matching of the objectives and the phases is:
*1G: Determine whether an incremental approach is required, and if so identify Transition Architectures that will deliver continuous business value
*2E: Generate the initial complete version of the Architecture Roadmap, based upon the gap analysis and candidate Architecture Roadmap components from Phases B, C, and D
*3F: Finalize the Architecture Roadmap and the supporting Implementation and Migration Plan
*4F: Ensure that the business value and cost of work packages and Transition Architectures is understood by key stakeholders References: 1: The TOGAF Architecture Development Method

Explanation
1E: To identify delivery vehicles (projects programs portfolios) that will deliver the Target Architecture 2F:
To confirm readiness and ability to undergo change 3E: To determine whether an incremental approach is required and if so identify Transition Architectures that will deliver continuous business value 4G: To perform appropriate governance functions while the solution is being implemented Reference: The TOGAF Standard | The Open Group Website, Section 3.2 ADM Phases.

An Architecture Contract is a deliverable that specifies the responsibilities and obligations of the parties involved in the implementation and governance of an architecture. It ensures a system of continuous monitoring to check integrity changes decision-making and audit of all architecture-related activities.
Reference: The TOGAF Standard | The Open Group Website, Section 3.3.4 Architecture Contracts.

The Request for Architecture Work is a deliverable that is sent from the sponsor and triggers the start of an architecture development cycle. It defines the scope, budget, schedule, and deliverables for a specific architecture project. The Statement of Architecture Work is a deliverable that is produced by the architect and defines the approach and resources needed to complete an architecture project. It forms the basis of a contractual agreement between the sponsor and the architecture organization. The Architecture Principles are a deliverable that is produced by the architect and defines the general rules and guidelines for the architecture work. They reflect the business principles, business goals, and business drivers of the organization. The Architecture Requirements Specification is a deliverable that is produced by the architect and defines the requirements that govern the architecture work. It covers both functional and non-functional requirements as well as constraints and assumptions.