Simplify the Expression Involving Rational Exponents $216^{-1 / 3}$ A) -6

B)

Simplify the expression involving rational exponents.
- $216^{-1 / 3}$

A) -6

B) $\frac{1}{6}$

C) $\frac{1}{7}$

D) $-\frac{1}{6}$