The tabe lists student-reported percentages of civics topics studied during the 12th grade school year Based on the data in the table, what conclusion can you draw about how the content of 12th grade civics classes has changed

A. students spend most of their time studying how congress works.

B. students in most civics classes study only one aspect of civics.

C. the topics taught in 12th grade civics classes did not change significantly between 1998 and 2006.

D. the aspect of civics students study the least is the court system.