Find the Indicated Product by Applying the Distributive Property and Combining

Multiple Choice

Find the indicated product by applying the distributive property and combining similar terms. $$\left( x ^ { 2 } - 7 x - 6 \right) \left( x ^ { 2 } + 9 x - 9 \right)$$

A) $x ^ { 4 } + 2 x ^ { 3 } - 15 x ^ { 2 } + 54 x + 9$
B) $x ^ { 4 } + 2 x ^ { 3 } - 78 x ^ { 2 } + 9 x + 54$
C) $x ^ { 4 } - 2 x ^ { 3 } - 72 x ^ { 2 } + 9 x + 54$
D) $x ^ { 4 } + 2 x ^ { 3 } - 78 x ^ { 2 } + 9 x - 54$
E) $x ^ { 4 } + 2 x ^ { 3 } - 78 x ^ { 2 } + 63 x + 54$