Ten students record their scores of hitting balls: $20$, $16$, $16$, $21$, $18$, $11$, $20$, $32$, $16$, and $21$. If the boy with the score of $32$ realizes that he actually gets only $22$, which of the following is correct? 
选项为:A:The mean decreases by $2$.  B:The mean increases by $1$.  C:The mode changes.  D:The median stay the same.  E:The median decreases by $1$.  请回答其中一个选项.