Factor by Grouping $$x ^ { 3 } - 7 x ^ { 2 } - 8 x + 56$$

Multiple Choice

Factor by grouping.
- $$x ^ { 3 } - 7 x ^ { 2 } - 8 x + 56$$

A) $( x + 7 ) \left( x ^ { 2 } + 8 \right)$
B) $( x - 7 ) \left( x ^ { 2 } - 8 \right)$
C) $( x + 7 ) \left( x ^ { 3 } - 8 \right)$
D) $( x - 7 ) \left( x ^ { 2 } + 8 x \right)$