Although the strategic arms limited treaty was signed by president carter and the Soviet Union , the treaty was never ratified due to critiques made by the senate and the

Though the 1972 treaty limited a wide variety of nuclear weapons, many ... the Soviet Union began almost immediately after SALT-I was ratified by both ... For the United States, fear that the Soviets were leaping ahead in the arms ... passed, and Carter ensured this by withdrawing the treaty from the Senate in January 1980.

letter d is correct.

b. 155 enlisted men and no officers