Excerpt from Sacramento Valley Transportation
Sacramento History Online

The rich natural resources made the Sacramento Valley a "Garden of Eden." Permanent villages were established about 8,000 years ago.
Which choice combines these two sentences from paragraph two to achieve a coherent flow of ideas?

A) The rich natural resources made the Sacramento Valley a "Garden of Eden" and permanent villages were established about 8,000 years ago.
B) Permanent villages were established about 8,000 years ago and the rich natural resources made the Sacramento Valley a "Garden of Eden."
C) The rich natural resources made the Sacramento Valley a "Garden of Eden;" and so the permanent villages were established about 8,000 years ago.
D) Because of the rich natural resources which made the Sacramento Valley a ‘Garden of Eden,’ Native Americans established permanent villages there 8,000 years ago.