Answer is C
The issue with the US and USSR was the stockpile of nuclear weapons.
They agreed to remove them from Cuba
If I remember correctly the opium wars resulted in china being figuratively split up by european powers. So, I'd go with 4.
D. War production took a back seat to consumer production.
War production skyrocketed once the United States entered WWll. The government basically put a ban on production of anything that didn't help the war effort.
All people are free and equal. Brainliest is appreciated<3