While you are working in a space, the fixed CO2 system is accidentally activated. You should __________.

Correct Answer: Option C — retreat to fresh air and ventilate the compartment before returning

Accidental fixed CO2 discharge creates a lethal, oxygen-deficient atmosphere. Marine safety procedures under 46 CFR require immediate evacuation to fresh air, total ventilation of the affected compartment, and verification of atmospheric safety before re-entry.