Answer:
7. D. Escalate.
8. A. Credibility Gap.
Step-by-step explanation:
The Gulf of Tonkin incident was a perceived unprovoked attack on the U.S. Navy destroyers, Maddox and Turner Joy which gave President Johnson the justification he needed to escalate the Vietnam war, which he did after presenting the incident to Congress.
During President Johnson's presidency, there developed a discrepancy between what the government said in public statements and what they actually did as was reported by several media houses. This led to the coining of the term, the Credibility Gap.