Factor the Expression $$2 x ^ { 3 } z - 4 x ^ { 2 } z + 28 x z - 56 z$$

Multiple Choice

Factor the expression. $$2 x ^ { 3 } z - 4 x ^ { 2 } z + 28 x z - 56 z$$

A) $2 z ( x - 2 ) \left( x ^ { 2 } + 14 \right)$
B) $2 z ( x + 2 ) \left( x ^ { 2 } - 14 \right)$
C) $2 z ( x + 2 ) \left( x ^ { 2 } + 28 \right)$
D) $2 z ( x + 2 ) \left( x ^ { 2 } + 14 \right)$
E) $2 z ( x - 2 ) \left( x ^ { 2 } - 14 \right)$