Which of the Following Statements Is True Concerning Cost-Of-Living Differences

Which of the following statements is true concerning cost-of-living differences?

A) It is generally more expensive to live on the coasts than in the middle of the country.
B) It is generally more expensive in rural areas than urban areas due to lower compensation levels.
C) There are few sources that allow for comparison of these differences.
D) Although housing varies by geographic area, food and clothing costs are relatively constant.