设集合 $S=\left\{\overline{)x}{x}^2+2x=0,x\in R\right\},T=\left\{\overline{)x}{x}^2-2x=0,x\in R\right\}$,则 $S\cap T=$（）

A．

$\left\{0\right\}$

B．

$\left\{0,2\right\}$

C．

$\left\{-2,0\right\}$

D．

$\left\{-2,0,2\right\}$