Question

germany practiced submarine warfare with the use of what?
a. atomic weapons
b. u - boats
c. battleships
d. machine guns

Explanation:

Germany used U - Boats (Unterseeboote, German for submarines) for submarine warfare in both World Wars. Atomic weapons are not related to submarine warfare. Battleships are surface - ships, not submarines. Machine guns are not the main tool for submarine warfare.

Answer:

B. U - Boats