Perform the Operation and Simplify $- 3 a ^ { 2 } ( a + 1 ) + 9 a \left( a ^ { 2 } - 6 \right) - a ^ { 2 } ( a + 6 )$

Multiple Choice

Perform the operation and simplify. $- 3 a ^ { 2 } ( a + 1 ) + 9 a \left( a ^ { 2 } - 6 \right) - a ^ { 2 } ( a + 6 )$

A) $\quad 5 a ^ { 3 } - 9 a ^ { 2 } - 54 a$
B) $\quad 5 a ^ { 3 } - 9 a ^ { 2 } - 54$
C) $\quad 5 a ^ { 2 } + 9 a ^ { 4 } - 54$
D) 0