Gas can enter the bloodstream and cause serious damage to the lungs or even death by:

A - Ascending too fast

B - Holding your breath while diving

C - Diving with respiratory congestion

D - All answers are correct

Answer is D. All answers are correct.

Explanation:

All the activities given as the options will make a person breath-in compressed air which contain nitrogen. The nitrogen enters the body tissue at high pressure, this will cause pains in the joints, muscles, nausea and even paralysis.