Find the Product $$- 6 x ^ { 4 } \left( 8 x ^ { 5 } + 7 \right)$$

Multiple Choice

Find the product.
- $$- 6 x ^ { 4 } \left( 8 x ^ { 5 } + 7 \right)$$

A) $- 48 x ^ { 5 } - 42$
B) $- 48 x ^ { 9 } - 42 x ^ { 4 }$
C) $- 48 x ^ { 9 } + 7$
D) $- 90 x ^ { 4 }$