Which Sentence Uses Correct Capitalization

Multiple Choice

Which sentence uses correct capitalization?

A) An agricultural marketing group went to cities along the east coast and in the desert southwest promoting recipes featuring pork for holiday meals.
B) An agricultural marketing group went to cities along the East Coast and in the Desert Southwest promoting recipes featuring pork for holiday meals.
C) ​An agricultural marketing group went to cities along the East coast and in the Desert southwest promoting recipes featuring pork for holiday meals.