Factor Completely Using the Trial and Error Method to Factor $x ^ { 6 } - 3 x ^ { 5 } - 18 x ^ { 4 }$

Multiple Choice

Factor completely using the trial and error method to factor trinomials. If unfactorable, indicate that the polynomial is
prime.
- $x ^ { 6 } - 3 x ^ { 5 } - 18 x ^ { 4 }$

A) $x ^ { 4 } ( x + 3 ) ( x + 6 )$
B) $x ^ { 3 } \left( x ^ { 2 } - 3 x - 18 \right)$
C) $x ^ { 4 } ( x - 3 ) ( x - 6 )$
D) $x ^ { 4 } ( x + 3 ) ( x - 6 )$