MNScuba.com

The actual physical cause for decompression illness (
DCI) is.
a. dehydration and cold water
b. heavy exertion before diving.
c. heavy exertion after diving.
d. bubble formation and growth.

Is this a trick?  I would say D.  A, B, and C contribute to D.  But D is the actual cause of DCS. Right?  What do I win and where do I pick it up?

The "actual physical cause"  is D, but A and C are contibuting factors.  B is physical conditioning....Which should be done prior to diving to keep in shape!