Simplify and Write with Positive Exponents Only $\frac { 3 x ^ { - 6 } } { x ^ { 3 } }$

Multiple Choice

Simplify and write with positive exponents only.
- $\frac { 3 x ^ { - 6 } } { x ^ { 3 } }$

A) $\frac { 1 } { 3 x ^ { 3 } }$
B) $3 x ^ { 9 }$
C) $\frac { 1 } { 3 \times ^ { 18 } }$
D) $\frac { 3 } { x ^ { 9 } }$