The correct answer is A) outspending the Soviet Union on weapons.
After détente was abandoned, the U.S. President believed that the Cold War could be won by outspending the Soviet Union on weapons.
Détente was the moment in the Cold War, when the leader of the Soviet Union, Leonid Brezhnev, and the President of the United States -Richard Nixon- agreed on limiting the production of nuclear missiles. The idea was to get better relationships during those years of the Cold War.
However, things couldn't move on as planned, and more tension was created when both countries fiercely competed in the arms race.