Respuesta :
The best answer to the question that is being asked and being presented above would be the event of the Vietnam war. The event that is the Vietnam war brought momentum to the movement to lower the voting age from 21 to 18.
Answer:
B. Vietnam War
Explanation:
The 26 Amendment lowered the legal voting age in the United States from 21 to 18. The long debate over lowering the voting age began during World War II and intensified during the Vietnam War, when young men denied the right to vote were being conscripted to fight for their country.