Why did Spain initially have little interest in settling California?

Why did Spain initially have little interest in settling California?

a. The region was full of Native American groups who fought any Europeans who tried to settle
there.
b. The region had so many French settlers that the Spanish did not want to fight over land with them.
c. The region appeared to lack natural resources and was not easy to reach from Mexico City.
d. The region was continually plagued by earthquakes, which frightened the settlers away.
e. The region was too close to Mexico City and the Native American groups there.

ANSWER
C