The cube root of .000216 is:

Answer: Option B

$$\begin{array}{rl}& {\left(.000216\right)}^{\frac{1}{3}}={\left(\frac{216}{{10}^6}\right)}^{\frac{1}{3}}\\ & ={\left(\frac{6\times 6\times 6}{{10}^2\times {10}^2\times {10}^2}\right)}^{\frac{1}{3}}\\ & =\frac{6}{{10}^2}\\ & =\frac{6}{100}\\ & =0.06\end{array}$$