Based on the excerpt, which phrase best describes the main goal of U.S. foreign policy in Vietnam during the Cold War?
A. to restore French rule in Vietnam
B. to establish a colony in South Vietnam
C. to unite Vietnam under one government
D. to prevent the spread of communism to South Vietnam
![Based on the excerpt which phrase best describes the main goal of US foreign policy in Vietnam during the Cold War A to restore French rule in Vietnam B to esta class=](https://us-static.z-dn.net/files/d15/46f18afc0822f5d9cc274617aeb7f394.png)