When did people begin living in the land we know today as North America? a. People arrived about 2,000 years ago.

b. People have lived on American soil for over half a million years.

The first people came with Christopher Columbus in 1492.

d. Scientists and historians do not have enough evidence to know for sure.

C.

D.

Explanation:

There is not enough information to know exactly when, however the time North America was populated first was estimated to be about 33,000 years ago.

nuclear fission produces the atomic bomb, a weapon of mass destruction that uses power released by the splitting of atomic nuclei the fighting in iwo jima and okinawa affected the allies' pacific strategy because truman decided to drop the atomic bomb on mainland japan.

the government closely monitored its finances to avoid another financial collapse.