A small passenger vessel of not more than 65 feet in length must have a collision bulkhead if it __________.

Correct Answer: Option D — All of the above

46 CFR 179.310 requires a collision bulkhead for small passenger vessels under 65 feet if they carry more than 49 passengers, operate on exposed waters, or are over 40 feet and operate on partially exposed waters. These structural requirements ensure vessel integrity and buoyancy in the event of a forward impact.