How did enemy invasions affect the Western Roman Empire?

A. The defensive walls started to crumble because of attacks.
B. The military began to weaken because of attacks.
C. The region began to have more cultural diversity.
D. Western Rome began having communication failures with its capital.

ITS  D I JUST DID THE TEST

Explanation:

D makes no since and in the comments I saw that someone said b and then someone else tried it and got B so I am going to try B for myself and in this comment I will share if it is right! Over all my guess is B!

the big stick policy was to still look powerful, and be nice at the same time. the big stick policy was also to countries who were at war, find peace with eachother.

the dollar diplomacy was to expand american business and get it to latin america, for that would be good for the economy.

you my friend, your regards.

agubaba khaleekha.