Use the Product Rule to Simplify the Expression $( - 6 ) ^ { 9 } ( - 6 ) ^ { 5 }$

Use the product rule to simplify the expression. Write the result using exponents.
- $( - 6 ) ^ { 9 } ( - 6 ) ^ { 5 }$

A) $- 6^{14}$
B) $3 6^{45}$
C) $( - 6 ) ^ { 14 }$
D) $3 6^{14}$