Explanation
Phishing is a scenario where someone claiming to be from a legitimate organization sends an email or other message to a target person asking for sensitive information or access to a system or account. Phishing is a type of cyberattack that aims to trick the target into revealing personal or financial data or installing malware on their device. Phishing can compromise the security and privacy of the target and expose them to identity theft, fraud, or other malicious activities.

Explanation
The project manager should have generated a contingency plan first to alleviate the impact of this issue prior to deployment where a major malfunction resulted in an inoperative product condition during a code implementation. A contingency plan is a plan that outlines alternative courses of action or strategies to deal with potential problems or risks that may occur during a project. A contingency plan can help to prevent or minimize the negative impacts of unforeseen events or issues on the project objectives and deliverables and ensure business continuity and stability.

The RACI (Responsible, Accountable, Consulted, Informed) matrix is used to document which resources are responsible for which tasks. The RACI matrix is a tool that helps to clarify roles and responsibilities on a project. It assigns a level of responsibility to each resource involved in the project. References: CompTIA Project+ Study Guide Section 3.4.
The project manager should use a RACI matrix to document which resources are responsible for which tasks. A RACI matrix is a type of responsibility assignment matrix (RAM) that plots the roles and responsibilities of resources on a project team. RACI stands for Responsible, Accountable, Consulted, and Informed. A RACI matrix can help to clarify who does what on a project, avoid confusion and duplication of work, and improve communication and collaboration among team members.

Explanation
The project manager should produce a project charter first to start communication about the boundaries of the project. A project charter is a document that formally authorizes a project and defines its high-level scope, objectives, assumptions, constraints, stakeholders, roles and responsibilities, and key deliverables. A project charter can help to communicate the project vision and expectations to all stakeholders and provide a basis for future project decisions23

The project scope is the document that defines and describes the project objectives, deliverables, requirements, boundaries, assumptions, and constraints. It also includes the success criteria that should be fulfilled by the product or service to meet the stakeholder expectations and the business case. The success criteria are the measurable standards that indicate whether the project has achieved its intended results. The other options are not correct because:
A quality plan is the document that defines and describes the quality standards, policies, procedures, tools, and techniques that will be applied to the project to ensure that the deliverables meet the requirements and the success criteria.
Contract obligations are the terms and conditions that bind the parties involved in a contractual agreement, such as the project manager, the customer, the sponsor, and the vendor. Contract obligations specify the roles, responsibilities, deliverables, payments, and penalties of each party.
A work breakdown structure (WBS) is a graphical representation of the project scope that breaks down the deliverables into smaller and manageable components. A WBS shows the hierarchy and relationship of the project elements, but does not include the success criteria. References = CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter 6: Planning Projects, Part 2 (Scope, Quality, and Risk), pages 175-179; CompTIA Project+ Certification Exam Objectives, Domain 2: Project Planning, Objective 2.1: Given a scenario, create a project charter and project management plan.