The purpose of the Manhattan Project was to a. Provide economic aid to Latin American countries.
b. Develop atomic weapons for the U. S. military.
c. Bring about an end to poverty in U. S. urban areas.
d. Offer assistance to relocated European refugees

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.