Which of the Following Guidelines Increases the Effectiveness of a Bar

Multiple Choice

Which of the following guidelines increases the effectiveness of a bar chart?

A) Bars should be about half the width of the space in between bars.
B) Legend should only be used if the chart has two or more data series.
C) The baseline for bar charts should always be ten.
D) 3-D bar charts should be used to represent complicated numerical information.
E) Use lighter colors to represent your most important data series.