Which definition best describes militarism? A) A policy of maintaining a large army
B) A policy of peaceful coexistence
C) A partnership formed between nations
D) A policy of isolation from foreign relations

A
Because the definition of militarism states:

the belief or desire of a government or people that a country should maintain a strong military capability and be prepared to use it aggressively to defend or promote national interests.

Hope this helps!
Brainliest and a like is much appreciated!