The correct answer is B) to right the raft if it capsizes. Inflatable liferafts are designed with hand holds or straps on the underside specifically to allow the crew to right the raft in the event it capsizes in the water. These features provide a means for the crew to flip the raft back over to its upright position, which is crucial for maintaining stability and accessibility of the raft's contents. The other answer choices are incorrect because: A) the hand holds are not primarily for crew to hang on to, C) the straps are not for drying the raft, and D) the straps are not for carrying the raft around on deck (the raft would typically have dedicated lifting handles for that purpose).