84. You have abandoned ship and are in an inflatable raft that has just inflated. You hear a continuous hissing coming from a fitting in a buoyancy tube. What is the cause of this?

A. The saltwater is activating the batteries of the marker lights on the canopy.
B. The inflation pump is in automatic operation to keep the tubes fully inflated.
C. A deflation plug is partially open allowing the escape of CO2.
D. Excess inflation pressure is bleeding off and should soon stop.