When the following numbers are put in order of size, which comes in the middle?  $0.75, 79\textbackslash\%, \frac79, 0.7, \frac57$ 
选项为:A:$$0.75$$  B:$79\textbackslash\%$  C:$\frac79$  D:$0.7$  E:$\frac57$  请回答其中一个选项.