What event prompted the Gulf of Tonkin Resolution?

North Vietnam attacked a US warship.
South Vietnam elected Viet Cong politicians.
South Vietnam sent troops into North Vietnam.
North Vietnam assassinated the president of South Vietnam.

The resolution was prompted by two separate attacks on two U.S. Navy destroyers, U.S.S. Maddox and U.S.S. Turner Joy, which allegedly occurred on August 2 and August 4, 1964, respectively.

Explanation:

polling is a process and the outcome is not involved in the process itself.

the outcome, which is an unfavorable rating for a particular candidate is not affected by the mechanical process of polling.

it rather depends on the number of people voting in favor of the candidate.

this is an outcome of people's preferences.