An administrator sees that smoke is coming from the UPS. Which of the following should they do FIRST?

Using a fire extinguisher should only be attempted by trained personnel after personnel safety is ensured, and an electrical fire would typically require a Class C extinguisher, not Class A.

Smoke coming from a UPS indicates a critical failure and a potential fire hazard, which poses an immediate danger to human life. The safety of personnel is always the highest priority in any emergency, requiring prompt evacuation to prevent injury or harm.

Installing additional fans is a maintenance or preventative measure and is not appropriate as an immediate response to an active failure indicated by smoke.

Backing up servers requires time and puts personnel at risk near a potentially failing and smoking electrical device; personnel safety takes precedence over data backup in this immediate situation.