Simplify the Rational Expression $\frac { 18 x ^ { 3 } } { 6 x }$

Multiple Choice

Simplify the rational expression. (Assume the denominator is nonzero.)
- $\frac { 18 x ^ { 3 } } { 6 x }$

A) $12 x ^ { 2 }$
B) $3 x ^ { 2 }$
C) 12
D) $3 x$