Factor Out the Indicated Quantity $- 40 q ^ { 4 } r + 56 q ^ { 3 } r - 24 q ^ { 2 } r$

Multiple Choice

Factor out the indicated quantity.
- $- 40 q ^ { 4 } r + 56 q ^ { 3 } r - 24 q ^ { 2 } r$ : Factor out the quantity $- 8 q ^ { 2 } r$

A) $- 8 q ^ { 2 } r \left( 5 q ^ { 2 } - 7 q + 3 \right)$
B) $- 8 q ^ { 2 } r \left( - 5 q ^ { 2 } - 7 q + 3 \right)$
C) $- 8 q ^ { 2 } r \left( - 5 q ^ { 2 } + 7 q - 3 \right)$
D) $- 8 q ^ { 2 } r \left( 5 q ^ { 3 } - 7 q ^ { 2 } + 3 \right)$