In the case of an injury causing a person to be incapacitated, the Master or person in charge of a mobile offshore drilling unit must submit a report to the __________.

Correct Answer: Option B — nearest Marine Safety or Marine Inspection Office

46 CFR 109.411 requires the master or person in charge to report casualties involving incapacitation to the nearest Coast Guard Marine Safety or Marine Inspection Office. This reporting requirement ensures the Coast Guard can investigate incidents that impact the safety of the crew and the vessel.