Which event directly led to the end of the vietnam war?

a) the tet offensive

b) the my lai mas.

c) the us bbing of the chi minh trail

d) the us x-mas bbing campaign

 The correct answer is :  D) the US X-Mas bbing campaign

Explanation:  The Christmas bombing occurred in 1972 by the United States and was the most devastating offensive of the entire war, lasted 12 days for 24 hours a day. They destroyed wharves, bridges, railroads, transmitters, radio transmitters, oil deposits, hospitals, streets, houses, factories and the population of North Vietnam was greatly diminished.

c) troops march forward in close formation against newer, more accurate weapons