For which of the following would it be inappropriate to display the data with a single pie chart? (a) The distribution of car colors for vehicles purchased in the last month. (b) The distribution of...

For which of the following would it be inappropriate to display the data with a single pie chart?

(a) The distribution of car colors for vehicles purchased in the last month.

(b) The distribution of unemployment percentages for each of the 50 states.

(c) The distribution of favorite sport for a sample of 30 middle school students.

(d) The distribution of shoe type worn by shoppers at a local mall.

(e) The distribution of presidential candidate preference for voters in a state.