Answer :
The best way President Kennedy should respond to the Soviet Arms Buildup in Cuba is to have diplomatic talks with the Soviet Union to stop this arms buildup and if this failed, try and block the arms transport.
What was the Soviet Arms Buildup in Cuba?
This refers to the period in history when the Soviet Union was stockpiling weapons in Cuba in a bid to strengthen the Communist position in Cuba and prevent a U.S attack.
Hence, as President Kenedy's advisor, it would be worth noting that the diplomatic approach would be brought up to avoid direct conflict and if this failed, then having a blockade to stop further arms transport to Cuba would be necessary.
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