Use the excerpt to answer the following question. “The Congress approves and supports the determination of the President, as Commander in Chief, to take all necessary measures to repel any armed attack against the forces of the United States and to prevent further aggression.”

—Gulf of Tonkin Resolution, August 7, 1964

Based on the excerpt, which of the following explains why the Gulf of Tonkin Resolution was significant?

A.
Congress denied the President the funding he needed to fight a war in Vietnam.

B.
Congress authorized the President to take military action in South Vietnam.

C.
Congress provided the President with new constitutional powers to declare war.

D.
Congress showed its support for a policy of isolationism.