President Kennedy responded to the Cuban Missile Crisis by reducing travel and trade restrictions with Cuba.
instructing Senator McCarthy to find US communists.
stationing troops along the 59th parallel.
imposing a quarantine on Cuba.

Stationing troops along the 59th parallel imposing a quarantine on Cuba is the answer

Explanation:

C

Explanation:

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;