In the1960's, the United States was involved in Vietnam primary because: (1 point)

O treared that if Vietnam became communist there would be a domino eflect causing surrounding countries to become
• Cambodia was threatened militarily by the possibility of a Communist government in Vietnam.
• American businesses in Vietnam supported Communist control.
• the American people supported the involvement in Vietnam.

• the United States feared that if Vietnam became communist, there would be a domino effect causing surrounding countries to become communist as well.