Can someone please help me with these questions.

Apurging of emotions, specially pity and fear

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more.b-it made cross-country travel too expensive for ordinary americans.c-it decreased the safety of americans who moved to settle the plains.d-it shortened travel time between the east and west for all americans.

During world war ll, the untied states was a member of the allies axis european theater pacific theater