During topping off of bunker tanks, the loading rate must be personally supervised by the __________.

Correct Answer: Option A — person in charge

Per 33 CFR 155.700, the Person in Charge (PIC) must supervise all bunkering operations. This individual is responsible for ensuring that all safety procedures, including communication with the terminal and monitoring of tank levels during the critical topping-off phase, are strictly followed to prevent pollution incidents.