Simplify Express Your Answer with Positive Exponents $\frac { x ^ { 2 } } { x ^ { - 9 } }$

Multiple Choice

Simplify. Express your answer with positive exponents. Assume that all variables are nonzero.
- $\frac { x ^ { 2 } } { x ^ { - 9 } }$

A) $\frac { 1 } { x ^ { 11 } }$
B) $x ^ { 18 }$
C) $x^{ 11}$
D) $\frac { 1 } { x ^ { 18 } }$