Which of the following is an example of an IT security control?

The selection of systems access control as an example of an IT security control is accurate because it directly pertains to regulating who can access certain systems and data within an organization. Access controls are fundamental in safeguarding sensitive information and ensuring that only authorized individuals can perform specific actions on the system. This can include functionalities such as authentication measures (like passwords or biometric verification), user role assignments, and permission levels, all of which are designed to protect the integrity and confidentiality of data.

In contrast, corporate branding guidelines pertain to marketing and identity standards, employee performance reviews focus on the evaluation of employee work, and customer relationship management involves strategies and tools for managing interactions with customers. None of these directly address the framework for securing IT systems or managing access to sensitive information, which is the core purpose of IT security controls. Thus, systems access control is the most appropriate answer as it highlights practices that are crucial for maintaining cybersecurity and protecting organizational assets.