Explanation
Requirements define control activities, which are the actions, processes, or mechanisms that are implemented to achieve the control objectives1. Control objectives are the targets or desired conditions to be met that are designed to ensure that policy intent is met2. Guidelines are the recommended practices or advice that provide flexibility in how to implement a policy, standard, or control3. Policies are the statements of management's intent that establish the direction, purpose, and scope of an organization's internal control system4.
References:
COSO - Control Activities - Deloitte1, section on Control Activities
Words Matter - Understanding Policies, Control Objectives, Standards ...2, section on Control Objectives Understanding Policies, Control Objectives, Standards, Guidelines ...3, section on Guidelines Internal Control Handbook4, section on Policies

Explanation
Management representation is a term used in audit parlance to refer to the statements made by management in response to specific inquiries or through the financial statements, as part of the audit evidence that the auditor obtains. Management representation can be oral or written, but the auditor usually obtains written representation from management in the form of a letter that attests to the accuracy and completeness of the financial statements and other information provided to the auditor. The management representation letter is signed by senior management, such as the CEO and CFO, and is dated the same date of audit work completion. The management representation letter confirms or documents the representations explicitly or implicitly given to the auditor during the audit, indicates the continuing appropriateness of such representations, and reduces the possibility of misunderstanding concerning the matters that are the subject of the representations12.
Management representation is not a person or group of persons representing executive management during audits (A), as this would imply that management is not directly involved or accountable for the audit process.
Management representation is not a mechanism to represent organizational structure (B), as this would imply that management representation is a graphical or diagrammatic tool to show the hierarchy or relationships within an organization. Management representation is not a project management technique to demonstrate management's involvement in key project stages , as this would imply that management representation is a method or practice to monitor or report on the progress or outcomes of a project.

Explanation
Continuous integration (CI) is the most critical concept for managing the building and testing of code in DevOps. CI is the practice of merging all developers' working copies of code to a shared mainline several times a day. This enables early detection and resolution of bugs, conflicts, and errors, as well as faster and more frequent feedback loops. CI also facilitates the automation of building, testing, and deploying code, which improves the quality, reliability, and security of the software delivery process. CI is a prerequisite for continuous delivery (CD) and continuous deployment (CD), which are the next stages of DevOps maturity that aim to deliver software to customers faster and more frequently.
ISACA, Certificate of Cloud Auditing Knowledge (CCAK) Study Guide, 2021, p. 114-115 Cloud Security Alliance (CSA), Cloud Controls Matrix (CCM) v4.0, 2021, DCS-01: Datacenter Security - Build and Test What is Continuous Integration?
Continuous Integration vs Continuous Delivery vs Continuous Deployment