Answer:
I'm assuming that it could be the third one or 'C' It seems like it's the most best answer and more realistic to say at the very least...
The headright system was implemented in an effort to
The Flexible response was a policy implemented by President John F. Kennedy in 1961 in order to substitute the New Look and the massive retaliation policy that Dwight Eisenhower's had introduced, which consisted on responding using a greater force in case of an attack, and such force involved nuclear weapons.
On the other hand, the flexible response policy aknowledges the Mutual assured destruction if nuclear weapons are involved, as the enemy with shoot back too. It aimed to provide a manner of responding to agression across the spectrum of war but without the employment of nuclear weapons.
