设集合 $U=\left\{x\in \overline{)N}0<x\le 8\right\},S=\left\{1,2,4,5\right\},T=\left\{3,5,7\right\}$，则 $S\cap \left(C_{U}T\right)=$（）

A．

$\left\{1,2,4\right\}$

B．

$\left\{1,2,3,4,5,7\right\}$

C．

$\left\{1,2\right\}$

D．

$\left\{1,2,4,5,6,8\right\}$