Arabias rainfall / average only 2-5 inches a year / two- year droughts / not uncommon

A. Arabia's rainfall averages only 2-5 inches a year, and two-year droughts are not uncommon.

B. As Arabia's rainfall averages only 2-5 inches a year, and two year droughts are not uncommon.

C. Arabia's rainfall averages only 2-5 inches a year, which makes two year droughts are not uncommon.

D. Arabia's rainfall averages only 2-5 inches a year, and however two year droughts are not uncommon.