What problem made China reluctant to improve relations with the United States?
A. Soviet aggression
B. The U. S.-Soviet arms race
C. The U. S. counterculture
D. The Vietnam War

B.Te U.S.- Sovient arms race

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it’s “the Vietnam war”

Explanation: just took the test

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.