I believe the answer is D. Hope this helps.
Polk believed that it was the destiny of the U.S. to expand
entire continent as part of its Manifest Destiny. He believed that the war with
Mexico fitted well with that vision.
When the U.S. won it took over several territories from the Mexicans.
Answer: The USA was afraid that communism would spread to South Vietnam and then the rest of Asia. It decided to send money, supplies and military advisers to help the South Vietnamese Government.
Explanation:
