Which of the following characteristic describes the ability to identify problems and take corrective action such as to repair or upgrade a component in a running system?

Serviceability refers to how easily a system can be diagnosed, repaired, or upgraded while operational. It focuses on maintenance capabilities like identifying faults and applying fixes without downtime. Availability (A) is about uptime, manageability (B) is about administration ease, extensibility (C) is about adding features, and usability (E) is about user experience.