What do you think it is ? Brainlist

I'm not sure but maybe this can help

The Open Door Policy was a clever move on the part of the United States to create trade opportunities between the U.S. and China while additionally asserting American interests in the Far East. In the short term, the Open Door Policy allowed the United States to expand its markets for industrialized goods.

i think its C  or A but im kind leaning to C

Explanation:

they gained popular support by speaking out against communists

in the united states. ( d.)