If the designers of submarines do not appropriately account for hydrostatic pressure,

A) the pressure could crush the submarine

B) the submarine can reach unlimited depths.

C) the submarine can be used as long as no people are in it.

D) lack of oxygen could kill any potential divers in the submarine.

A) the pressure could crush the submarine

Explanation:

The submarines are mainly used for defense purposes. In world war 1 and 2 the submarines played a vital role in the war. The submarines work according to the principle of buoyancy. According to this principle, when seawater is filled inside the tank in a required amount, the submarines sink. When the seawater is expelled, the submarine rises to above the sea. Most of the time, it dives deep into the sea, the hydrostatic pressure should be taken into account. If the hydrostatic pressure is not considered, the pressure could crush the submarine.