Implementing automated log monitoring is the best control to detect an advanced persistent threat (APT), which is a stealthy and continuous attack on a target network or system. Automated log monitoring can help to identify anomalous or suspicious activities, such as unusual network traffic, unauthorized access attempts, or data exfiltration, that may indicate the presence of an APT. Utilizing antivirus systems and firewalls, conducting regular penetration tests, and monitoring social media activities are controls that help to prevent or mitigate APTs, but not to detect them. References = Most Asked CRISC Exam Questions and Answers - The Knowledge Academy, question 200.

It is most important for a risk practitioner to have an awareness of an organization's processes in order to identify potential sources of risk, as this enables the risk practitioner to understand the objectives, activities, resources, dependencies, and outputs of the processes, and how they may be affected by internal or external factors that create uncertainty or variability. Identifying potential sources of risk is the first step in the risk identification process, which aims to find, recognize, and describe the risks that could affect the achievement of the organization's goals. The other options are not the most important reasons for a risk practitioner to have an awareness of an organization's processes, although they may be related or beneficial aspects of it.
Performing a business impact analysis is a part of the risk analysis process, which aims to understand the nature and extent of the risks and their consequences on the organization's objectives and functions.
Establishing risk guidelines is a part of the risk governance process, which aims to define and communicate the risk management principles, policies, and roles across the organization. Understanding control design is a part of the risk response process, which aims to select and implement the appropriate actions to modify the risk level or achieve the risk objectives. References = Risk and Information Systems Control Study Manual, Chapter 2: IT Risk Identification, page 47.

The best way to mitigate the security risk associated with the inappropriate use of enterprise applications on the BYOD devices is to implement BYOD mobile device management (MDM) controls. MDM controls are software tools or services that allow the organization to remotely manage, monitor, and secure the BYOD devices and the enterprise applications and data on them. MDM controls can help to enforce security policies, restrict unauthorized access, encrypt sensitive data, wipe data in case of loss or theft, and update or patch applications. The other options are not as effective as implementing MDM controls, as they are related to the review, awareness, or recovery of the BYOD devices and applications, not the prevention or protection of the security risk. References = Risk and Information Systems Control Study Manual, Chapter 3: IT Risk Response, Section 3.3: IT Risk Response Implementation, page 145.

The best way to resolve the concern where a control process has been implemented in response to a new regulatory requirement, but has significantly reduced productivity, is to escalate the issue to senior management. Senior management is the highest level of authority and responsibility in the organization, and they are responsible for setting the strategic direction, objectives, and risk appetite of the organization. Senior management should also oversee the risk management process, and ensure that the controls are aligned with the organization's goals and values. Escalating the issue to senior management can help to find a balance between complying with the regulatory requirement and maintaining the productivity of the organization. The other options are not as effective or desirable as escalating the issue to senior management, because they either ignore the problem, violate the regulation, or compromise the control.