Which of the Following Statements Is True

Which of the following statements is true?

A) In constructing a pie chart for a categorical variable, one sector of the pie is assigned to each category of the variable.
B) A bar chart for a categorical variable shows the same distribution of measurements in categories as the pie chart, but with the height of each bar measuring how often a particular category was observed.
C) The categories for a qualitative variable should be chosen so that a measurement will belong to one and only one category, and each measurement has a category to which it can be assigned.
D) In constructing a pie chart for a categorical variable, one sector of the pie is assigned to each category of the variable and a bar chart for a categorical variable shows the same distribution of measurements in categories as the pie chart, but with the height of each bar measuring how often a particular category was observed.
E) All of these.