Final answer:
C. Checking for adequate power. The correct answer is C. Checking for adequate power. System security encompasses measures such as system access, backing up data, and securing files.
Step-by-step explanation:
The correct answer is C. Checking for adequate power.
System security is an essential aspect of maintaining the integrity and confidentiality of computer systems and their data. It involves implementing various measures to protect against unauthorized access, data loss, and security breaches.
System access, backing up data, and securing files are all important components of system security. System access refers to managing user privileges and permissions to ensure only authorized individuals have access to the system. Backing up data involves creating copies of important files and information to protect against data loss. Secure files involve using encryption and access controls to protect sensitive information from unauthorized access or modification.
However, checking for adequate power is not directly related to system security. While power supply is important for the functioning of computer systems, it falls under the domain of hardware maintenance and reliability rather than system security.