By joining the allies in the war against fermany and the other central powets the us
a adopted an internationalist foreign policy
b became a leader in world affairs
c abandoned its policy of neutrality
d all of the above

The answer would be D. all the above

Explanation:

The reason for this answer is because once they entered the war they had no longer had neutrality then they  started to deal with the other nation so that is were choice a comes in and then when the war ends the world sees that the United states is a world leader

Hope this helps

d. she conquered the black sea coast and parts of poland.

omg i dont know oops sorry