I believe the answer is D I hope this answer is correct and helps you
Answer:
<h2>d) flexible response</h2>
The idea of "flexible response," initiated by the Kennedy administration in 1961, was to be able to respond to to military aggression in ways appropriate to each situation. Flexible response meant using conventional weapons and methods as appropriate rather than relying on a nuclear arsenal as the USA's primary deterrent in dealing with adversaries.
This was a reaction over against the brinkmanship that had developed under the Eisenhower administration, with the threat of massive retaliation against anyone who threatened the US. John Foster Dulles, Secretary of State under President Eisenhower, had developed the strong approach, going further than the containment policy of the previous administration (of Pres. Truman). In 1956, Dulles described brinkmanship as "the ability to get to the verge without getting into the war is the necessary art." He wasn't afraid to threaten massive retaliation against communist enemy countries as a way of intimidating them.
To be honest the motivation came from people wanting the honor that came with fighting and they were promises wages to send home to their families.
Answer: Life, Liberty, and the pursuit of Happiness.
Explanation: The second paragraph of the first article in the Declaration of Independence contains the phrase "Life, Liberty and the pursuit of Happiness".