How did the Gold Rush impact population numbers in the west? * a. The population numbers went down
b. The population numbers were unknown.
c. The population numbers went up.
d. The people did not move west.

The persian wars started when emperor darius i began an invasion of greece. what caused darius to decide to attack greece? a. greek pirates had raided persia's merchant ships and coastal towns. b. greek armies had attacked and taken over land that belonged to persia. c. greek city-states had supported rebellions in the persian empire. d. greek leaders had declared independence from the persian empire.