Most boating deaths are drownings. how many drowning victims were wearing a proper pfd at the time of the accident?

The number of victims that were wearing a proper PFD at the time of the accident are only: 10%
PFD stands for Personal floatation device such as a floating vest. When people use this, their body will be always brought up to the surface of the water so it will be unlikely that they will be a victim of drowning.

Think it's d but I don't know