Select all the correct answers. What were three effects of westward expansion?

I NEED 3 ANSWERS PLEASE! WILL GIVE BRANLIEST!!

A. the decline in supply and demand of fur

B. conflict with American Indian's over land use

C. breaking off peaceful ties with Mexico

D. the discovery of gold in the American River

E. the addition of Texas into the United States

for the united states of america, 1945 to 1964 was a time of high economic growth and general prosperity. it was also a time of confrontation as the capitalist united states and its allies politically opposed the soviet union and other communist countries; the cold war had begun.

explanation:

1. where does the energy of a nuclear power plant come from?

d) political bosses should not hold office

what do you mean