Question

What was the Arms Race between the U.S. and the Soviet union
~Iḿ pretty sure of the answer, but... I cant decide between the 2

(a)The competition of developing and producing advanced weapons to be supreme
or
(b)the advancement of nuclear energy resources

Answer 1

You're answer will be (a)The competition of developing and producing advanced weapons to be supreme

it is an Arms race, and another word for "Arms" is "weapons". Sure they developed their nuclear energy resources, but they mainly developed weapons and technology that makes killing people more easier.

hope this helps