The correct answer is: A. plotting data.
Plotting data is the process of representing data points on a graph. This can be done by using a variety of different types of graphs, such as line graphs, bar graphs, and pie charts. Plotting data can be helpful for visualizing data and identifying trends.
B. plotting costs is not the correct answer because it is not specific enough. Plotting costs could refer to plotting any type of cost, such as direct costs, indirect costs, or fixed costs.
C. plotting cost drivers is not the correct answer because it is not specific enough. Plotting cost drivers could refer to plotting any type of cost driver, such as labor, materials, or overhead.
D. plotting curved line is not the correct answer because it is not specific enough. Plotting a curved line could refer to plotting any type of curve, such as a line of best fit or a trend line.