How did the Gulf of Tonkin Resolution affect the Vietnam War?

Question

The resolution officially ended France’s imperialist claims to Vietnam.
The United States became fully engaged in fighting in the Vietnam War.
North Vietnamese leaders agreed to discuss ending the Vietnamese War.
The resolution established a demilitarized zone at the 17th parallel.

Answer 1

Once you post what you think the correct answer is for each of the questions you've posted, someone may be able to check them.

Answer 2

c

Answer 3

Correct. The Gulf of Tonkin Resolution gave President Johnson authorization to use military force to defend U.S. interests in Vietnam and ultimately resulted in a significant increase in the U.S. involvement in the war.