What was the major motivator of the arms race during the cold war?
a. both the soviet union and the united states worried that the other
would build up a larger nuclear arsenal.
o
b. the cuban missile crisis demonstrated the importance of nuclear
missiles to all countries' military strategies.
o
c. international proxy wars became so frequent that nearly all
countries built up massive military forces.
o
d. the soviet invasion of afghanistan forced the united states to
defend the middle east as well as asia and africa.

The right answer here is:

A. Both the Soviet Union and the United States worried that the other

would build up a larger nuclear arsenal.

Explanation:

During the two-superpower world competition that was the Cold War, each side always worried that the other side would enjoy military superiority, especially nuclear superiority. In a zero-sum world system, this was considered a serious, dangerous disadvantage, and in this situation, the country that had the edge could be tempted to use the nuclear  weapons first. The arms race followed a strategic reasoning called MAD, or Mutual Assured Destruction. Actually, the posession of nuclear missiles and bombs were rather intented as a tool of deterrence.

on the morning of  july 21,  1861, general mcdowell ordered the  unionarmy to attack. it was on this hill that  confederate  colonel thomas jackson and his forces held back theunion  troops.