The arms race was the result of the cuban missile crisis. the reason the united nations was formed. an expression of cold war tensions. a reason that the allies won world war ii.

The third one ( or C idk)

Explanation:

That crisis made the fear of a atomic war more real than everthing at the time, and showed to everyone that the thing could go nuclear at any time because the tensions between the countries

the answer for 3 is b and the answer for 4 is d

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.