What was Operation Rolling Thunder?

the title of entertainer Bob Hope’s 1968 Christmas show that he performed for the troops
the code name for the official evacuation of the American embassy in Saigon
a massive, three-year bombing campaign by the United States in North Vietnam
a law enforcement sweep of US college campuses to arrest antiwar protesters

2 answers

Is it C?
https://www.google.com/search?q=operation+rolling+thunder&oq=operation+rolling+thunder&aqs=chrome..69i57j69i60.7222j0j7&sourceid=chrome&ie=UTF-8

Yes.