A colleague has created a chart to show monthly sales figures and the corresponding percentage of total annual sales. The sales figures (in dollars) and percentages are on vastly different scales, making the chart difficult to read. Which of the following is the BEST solution to improve the chart's readability?
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A
Change the chart type to a 3-D pie chart.
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B
Use a combination chart and plot the percentage data on a secondary axis.
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C
Add data labels to both data series and remove the vertical axis.
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D
Increase the font size of the axis labels for better visibility.