California Is More of a Two-Tier State Than Some Other

California is more of a two-tier state than some other states. What does the author mean by this?

A) That California should be divided into two states: northern California and southern California
B) That there are too many people in California, and it should become its own country
C) That there are large gaps between those who are rich and those who are poor
D) That there are too many two-story houses