Mr. Franklin recorded the number of push-ups his students completed in thirty seconds. Which statement below is a reasonable conclusion based upon the information in the histogram?
A. Mr. Franklin has more than 20 students in his class.
B. No one completed 25 push-ups in thirty seconds.
C. Most students completed 21 to 25 push-ups in thirty minutes.
D. Four students completed 1 to 5 push-ups in thirty seconds.