$x$  is the answer of one of the following. Identify it.

Option ( B):  $\sqrt[12]{{\left(x^4\right)}^{\frac{1}{3}}}$

$\sqrt[12]{x^{4\times \frac{1}{3}}}=\sqrt[12]{x^{\frac{4}{3}}}$

$={\left(x^{\frac{4}{3}}\right)}^{\frac{1}{12}}$ $=x^{\frac{4}{3}\times \frac{1}{12}}=x^{\frac{4}{36}}=x^{\frac{1}{9}}$

Option ( C): ${\left(\sqrt{x^3}\right)}^{\frac{2}{3}}={\left[{\left(x^3\right)}^{\frac{1}{2}}\right]}^{\frac{2}{3}}$ $={\left[x^{3\times \frac{1}{2}}\right]}^{\frac{2}{3}}$ $={\left[x^{\frac{3}{2}}\right]}^{\frac{2}{3}}$ $=x^{\frac{3}{2}\times \frac{2}{3}}$ $=x$

Option ( D): $x^3-x^2\Rightarrow x^2\left(x-1\right)$