Answer: c called for a variety of military options that could be matched to the scope and importance of a crisis.
Step-by-step explanation:
Flexible response was a strategy implemented by President Kennedy after he took office as a modern and more relevant response to the threat of Communism than the Eisenhower administration before him.
This new strategy called for using a variety of military options that would vary in scale based on the threat at hand. It also called for mutual deterrence which led to Kennedy and Khrushchev talking with each other a couple of times.