Final answer:
The sentence with a capitalization error is C) I got lost in the deep south when I took a wrong turn in Bullock County, where 'deep south' should be capitalized as 'Deep South'.
Step-by-step explanation:
The sentence that has an error in capitalization is:
C) I got lost in the deep south when I took a wrong turn in Bullock County.
The term “deep south” should be capitalized as “Deep South” because it is a proper noun that refers to a specific region in the United States. In contrast, directions like 'north' in a general sense are not capitalized, as seen in sentence B). When 'north' is used in sentence D) it is referring to a specific place, so it is correctly capitalized there.