Question

(MC)The use of submarines during World War I had which of these effects?

It gave an advantage to the coastal nations.

It made naval battles the key battles of the war.

It made it difficult for merchants to bring supplies to the Allies.

It prevented the Central Powers from transporting troops.

Answer 1

It prevented the Central Powers from transporting troops

Answer 2

are u sure

Answer 3

Submarines had a real impact on the supply lines of enemy armies. Since most airplanes were not capable of transporting 'huge' supplies over long distances ships were used to transport resources from one continent to another.

I guess you can imagine the impact on any type of warfare if the supply lines were cut.

Submarines are also a weapon of war - but it was much easier to prowl on unsuspecting merchant marines than to attack warships. A destroyer was a formidable adversary for a submarine. Still is.