When Graphing Cost-Volume-Profit Data on a CVP Chart

When graphing cost-volume-profit data on a CVP chart:

A) Both units and costs are plotted on the horizontal axis.
B) Data points always represent expected future points.
C) Units are plotted on the horizontal axis; costs on the vertical axis.
D) Both units and cost are plotted on the vertical axis.
E) Units are plotted on the vertical axis; costs on the horizontal axis.