Claim A: the old age instutution of recces should be expanded beyond elementary students. Claim B: schools have too much to teach during the school day as it is, adding time for recess would be a waste of time.

Which claim does the following piece of evidence support?

A study conducted by Greentree Educational Institute showed that high school students performed 73 percent better in afternoon classes after being given 20 minutes of free time outside.

A. Claim B, because it explains the consequences of limiting recess time
B. Claim A, because it demonstrates the varying effects of recess on younger and older students
C. Claim B, because it emphasizes the important of academic performance
D, Claim A, because it shows a specific benefit of recess