How does paragraph 5 related to paragraph 4? A. Paragraph 5 finishes the explanation of the food-desert theory initiated in paragraph 4. B. Paragraph 5 explains why the author calls the theory set out in paragraph 4 the food-desert theory. C. Paragraph 5 suggests an alternative to the food-desert theory described in paragraph 4. D. Paragraph 5 mentions the limitations of the food-desert theory introduced in paragraph 4.