A responsibility matrix clarifies the division of responsibilities between the cloud service provider (CSP) and the customer, ensuring that each party understands and implements their respective security controls.
References: Security+ SY0-701 Course Content.

Upgrading end-of-support operating systems is one of the most effective ways to reduce the attack surface. Unsupported OS versions no longer receive security patches, making them prime targets for attackers. Removing outdated software ensures that known vulnerabilities cannot be exploited.
* A (honeynet) is used for threat analysis, not reducing the attack surface.
* B (Group Policy) helps enforce security policies but does not address outdated vulnerabilities.
* C (High availability) focuses on uptime, not security risk reduction.

The logs show an SQL injection attack. The first step is to verify if new accounts have been created, indicating a successful injection.

Peer review and approval is a practice that involves having other developers or experts review the code before it is deployed or released. Peer review and approval can help detect and prevent malicious code, errors, bugs, vulnerabilities, and poor quality in the development process. Peer review and approval can also enforce coding standards, best practices, and compliance requirements. Peer review and approval can be done manually or with the help of tools, such as code analysis, code review, and code signing. References:
CompTIA Security+ Study Guide: Exam SY0-701, 9th Edition, Chapter 11: Secure Application Development, page 543 2