Factor by Grouping $$x ^ { 3 } + 5 x ^ { 2 } + 8 x + 40$$

Multiple Choice

Factor by grouping.
- $$x ^ { 3 } + 5 x ^ { 2 } + 8 x + 40$$

A) $( x + 5 ) \left( x ^ { 2 } + 8 \right)$
B) $( x + 5 ) \left( x ^ { 2 } - 8 \right)$
C) $( x + 5 x ) \left( x ^ { 2 } + 8 \right)$
D) $( x - 5 ) \left( x ^ { 3 } + 8 \right)$