The normal and safest way for a sailor in a bosun's chair to be raised aloft is __________.

Correct Answer: Option D — manually by two or three sailors heaving away on deck

Manual hoisting by a team on deck is the safest method for raising a sailor in a bosun's chair. This provides direct, immediate control over the ascent speed and allows the deck crew to monitor the sailor's safety, avoiding the risks associated with mechanical winch failure or sudden, jerky movements.