Comprehensive and Detailed Explanation:
Secure code reviews identify security flaws or vulnerabilities in code before deployment. This makes them detective controls, since they help find issues but do not directly prevent or correct them.
Option A: Correct - they detect flaws.
Option B: Corrective controls are applied after issues are detected.
Option C: Monitoring is ongoing observation, not review-based.
Option D: Deterrent controls discourage actions (e.g., policies, warnings), not detect issues.
# ISACA Reference: CISA Review Manual 27th Edition, Domain 3, section on software development controls and code review practices.

Due professional care is the obligation of an IS auditor to exercise the appropriate level of skill, competence, and diligence in performing an audit. It also requires the IS auditor to comply with the relevant standards, guidelines, and ethical principles of the profession. Completing an engagement by email only may compromise due professional care, as it may limit the IS auditor's ability to obtain sufficient and appropriate evidence, to communicate effectively with the auditee and other stakeholders, and to perform adequate quality assurance and review procedures. The other options are not as relevant as due professional care, as they relate to specific aspects of an audit, such as proficiency (the knowledge and skills of the IS auditor), sufficient evidence (the quantity and quality of the audit evidence), and reporting (the presentation and communication of the audit results). References: CISA Review Manual (Digital Version), Domain 1: The Process of Auditing Information Systems, Section 1.2 ISACA IT Audit and Assurance Standards

The most important thing for the auditor to confirm when sourcing the population data for testing accounts payable controls by performing data analytics is that the data is taken directly from the system. Taking the data directly from the system can help ensure that the data is authentic, complete, and accurate, and that it has not been manipulated or modified by any intermediary sources or processes. The other options are not as important as taking the data directly from the system, as they do not affect the validity or reliability of the data. There is no privacy information in the data is a privacy concern that can help protect the confidentiality and integrity of personal or sensitive data, but it does not affect the accuracy or completeness of the data. The data can be obtained in a timely manner is a logistical concern that can help facilitate the efficiency and effectiveness of the data analytics process, but it does not affect the authenticity or accuracy of the data. The data analysis tools have been recently updated is a technical concern that can helpenhance the functionality and performance of the data analytics tools, but it does not affect the validity or reliability of the data. References: CISA Review Manual (Digital Version), Chapter 3, Section 3.2

Capacity management must consider business changes to ensure IT resources can meet future demand. If changes to critical systems are omitted from planning, capacity forecasts will be inaccurate, leading to risks of downtime, bottlenecks, and unplanned outages. A six-month review (A) might be acceptable depending on system dynamics. Lack of administrator input (C) and reliance on service management (D) reduce planning quality but are less critical than missing major business drivers. COBIT DSS01 (Managed Operations) and APO02 (Managed Strategy) emphasize alignment between IT capacity and business requirements.
References (ISACA): COBIT 2019, DSS01 Managed Operations; APO02 Managed Strategy.

Effective governance over IT infrastructure is indicated by the ability to deliver continuous, reliable performance12. This is because good governance ensures that IT investments support business objectives and produce measurable results towards achieving their strategies2. It involves implementing management and internal controls, strengthening security, financial controls, risk mitigation, and inspection and compliance obligations3. While security awareness programs, the number of servers, and the number of security incidents can be aspects of IT governance, they are not the best indicators of its effectiveness.
References:
The Value of IT Governance - ISACA
What is IT governance? A formal way to align IT and business strategy | CIO Robust Governance - KPMG Global