Answer:
Pretty much in a nutshell, it was capitalism versus communism.
Answer:
A. The creation of the mobile X-ray machines allowed the soldiers to have a much higher chance of survival as the doctors were able to find shrapnel and other issues before performing surgery
Explanation:
Marie Curie invented a vehicle containing an X-ray machine and photographic darkroom equipment that was used in WW1.
American expansion abroad was fueled by all of the following except "the closing of the frontier" since this was mainly a domestic issue.
It is probably the partition of India which was the division of British and India in 1947 which eventually created two independent dominions, India and Pakistan.
