Answer:
A. They were extremely precise and successful in every attack.
Explanation:
Depth charges are quite literally explosives in a barrel that sink to a set depth before exploding. They wouldn't be 100% accurate due to them tumbling as they went down into the water. You usually needed at least a couple of Depth charges before you could knock out a Jerry (slang word for German during world war 2, fun fact!) U-Boat submarine, and this still applies today.
Answer:
Because the was a lack of food during that time
