Which best describes the use of interchangeable parts in manufacturing in the 1800s?

Which best expresses the radical republican philosophy of reconstruction? a. the confederate states were conquered territories that should be ruled by military governors. b. the southern states actually never left the union. c. if ten percent of the voters of a state that had seceded took an oath of allegiance to the union, then it should be readmitted as a state.

This refers to weather and atmospheric conditions measured over a long period of time.

What challenges did nigeria faced after it gained its independence from britain