What statement BEST describes the motivation of Christopher Columbus? a
the Aztecs threatened to invade Spain
b
he wanted to spread the Christian religion to Native Americans
c
he wanted to sail to Asia
d
he heard about the cities of gold from Hernan Cortes

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.