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 wEEkA．6
B．12
C．15.5
D．16
E．21