Operation LINEBACKER II was the code name for the A) peace negotiatio

Operation LINEBACKER II was the code name for the

A) peace negotiations in Paris between the United States and North Vietnam between 1968 and 1973.
B) withdrawal of United States troops from South Vietnam between 1968 and 1973.
C) United States–South Vietnamese military incursion into Cambodia in 1970.
D) American bombing of North Vietnam during Christmas, 1972.

ANSWER
D