What effect did the Reagan Doctrine have on the Soviet Union?

Question

A. The Reagan Doctrine extended economic aid to first-world nations in an attempt to supplant Communist leanings.
B. The United States hoped to roll back the influence of Communism by actively promoting changes in political policies of third-world countries.
C. The United States extended the Roosevelt Corollary to include the Soviet Union from expanding imperialist desires in the western hemisphere.
D. It led to the United States declaring war to prevent the expansion of Soviet influence into third-world countries.

Is it D?

Answer 1

No, think about answer B.

Answer 2

what is it then?