Which three numbers can be put in the blanks to make the statement correct?  $6 \times$~\uline{~~~~~~~~~~}~$-$~\uline{~~~~~~~~~~}~$=$ $21 +$~\uline{~~~~~~~~~~}~$\times 2$ 
选项为:A:$5$, $4$ and $2$  B:$6$, $2$ and $7$  C:$7$, $5$ and $8$  D:$8$, $7$ and $11$  E:$9$, $7$ and $12$  请回答其中一个选项.