Factor by Grouping $$x ^ { 3 } - x ^ { 2 } + 9 x - 9$$

Multiple Choice

Factor by grouping.
- $$x ^ { 3 } - x ^ { 2 } + 9 x - 9$$

A) $\left( x ^ { 2 } - 9 \right) ( x + 1 )$
B) $\left( x ^ { 2 } + 9 \right) ( x - 1 )$
C) $\left( x ^ { 2 } - 1 \right) ( x + 9 )$
D) $\left( x ^ { 2 } + 1 \right) ( x - 9 )$