Regular American military forces entered Vietnam in order to:
a) Assist in planning a coup against Ngo Dinh Diem.
b) Promote democratic reforms in South Vietnam.
c) Set the stage for an invasion of North Vietnam.
d) Keep South Vietnam from falling to the communist until after the 1964 election.
e) Prevent Ngo Dinh Diem's regime from falling to the communists.
I chose answer (a). Can anyone confirm that this is correct?