单项选择题

Mr. Hernandez’s students filled out a survey asking how many hours each student watched television over 7 days. The results from the survey are shown below in a stem-and-leaf plot.


(Note: For example, 12 hours of television watched would have a stem value of 1 and a leaf value of 2)
Which of the following is the median number of hours of television watched during the week

A.6
B.12
C.15.5
D.16
E.21