A Teacher Is Tracking the Performance of Both Math and Spelling

A teacher is tracking the performance of both math and spelling assignments for each of her 25 students. For feedback purposes, she wishes to display each student's percent correct for both areas using a line graph. What would be the MOST effective and efficient way to accomplish this?

A) Prepare a large graph for spelling and a similar one for math and place on the graphs the average data for the entire class in the two content areas.
B) Prepare a separate graph for each student and, using a unique symbol for each content area, record the data and connect the similar symbols to create data path lines.
C) Prepare a single large graph and display each student's data for the spelling and math areas using unique symbols for each student and for each content area.
D) Prepare two graphs for each student, one for spelling and one for math, because there is no appropriate method for reporting these two content areas together on the same graph.