Question

As the Communists closed in on Saigon, the U.S. ordered _____.

air attacks against Hanoi and other North Vietnamese cities
the evacuation of Americans and South Vietnamese from the city
the mining of Haiphong harbor to prevent enemy ships from attacking
evacuation by boat of American military personnel via the Mekong River

Answer 1

the evacuation of Americans and South Vietnamese from the city...

Step-by-step explanation:

Answer 2

As the Communists closed in on Saigon, the U.S. ordered the evacuation of Americans and South Vietnamese from the city. The correct option among all the options that are given in the question is the second option. This was the first defeat of a war faced by the Americans. I hope the answer helped you.