Simplify the Expression and Write the Answer Without Negative Exponents $\left( - 7 x ^ { 9 } \right) \left( 5 x ^ { 3 } \right)$

Multiple Choice

Simplify the expression and write the answer without negative exponents.
- $\left( - 7 x ^ { 9 } \right) \left( 5 x ^ { 3 } \right)$

A) $- 35 x ^ { 27 }$
B) $35 x^{ 12}$
C) $35 x ^ { 27 }$
D) $- 35 x ^{12}$