Availability refers to

• A. Allowance of data being accessed at any time by authorized persons.
• B. System uptime percent.
• C. Data encryption.
• D. Version control.

Answer: (A)

Availability means that information and systems are accessible to authorized users whenever they need them. It focuses on ensuring access to data and services with minimal downtime, so people can rely on being able to use what they need when they need it. The option that describes data being accessed at any time by authorized persons captures this idea directly. System uptime percent is a useful measure of how often the system is up, but it’s a metric, not the definition of availability itself. Data encryption protects data from unauthorized access—confidentiality—rather than ensuring ongoing access. Version control tracks changes to data, not accessibility.