A CO2 extinguisher which has lost 10% of its charge must be __________.

Correct Answer: Option A — recharged

46 CFR 108.495 requires that any CO2 extinguisher found to have lost more than 10% of its rated capacity must be recharged. Maintaining the full charge is essential to ensure the extinguisher performs as designed during an emergency, as CO2 is a critical agent for electrical and flammable liquid fires.