Which set of numbers go into the missing blanks respectively to make the equation true?  $7=14$ $\div$~\uline{~~~~~~~~~~}~$=\frac{14}{\square}=\frac{14}{1}\times\frac{1}{\square}$ 
选项为:A:$2, 1, 2$  B:$1, 2, 2$  C:$2, 2, 1$  D:$2, 2, 2$  请回答其中一个选项.