The following function may $be$ viewed $as$ a composite function $h(x)=f(g(x)).$ Find $f(x)$ and $g(x).$

$h(x)=(2x^2-x+1{)}^6$

Choose the correct answer below.

$A.f(x)=2x^2-x+1,g(x)=x^6$

$B.f(x)=x^6,g(x)=2x^2-x+1$

$C.f(x)=2x^6+1,g(x)=x^2-x$

$D.f(x)=x^2-x,g(x)=2x^6+1$