About one-third of the people who came west turned around and went back home. Why? What challenges did they face?

They went home because they faced many hardships such as scare amounts of food, water and supplies. Also, many people were tired and couldn't go on the journey any more.

i would say your answer is a)

sorry if im wrong

the map that was shown mostly had eastern asia highlighted. the answer would mostly likely be "the spread of communism into eastern asia set the stage for the korean war."

hopefully this .