Add or Subtract as Indicated $\left( - 7 x ^ { 2 } + 2 \right) - \left( - x ^ { 3 } + 3 x ^ { 2 } + 8 \right)$

Multiple Choice

Add or subtract as indicated. Express the answer as a single polynomial in standard form.
- $\left( - 7 x ^ { 2 } + 2 \right) - \left( - x ^ { 3 } + 3 x ^ { 2 } + 8 \right)$

A) $x ^ { 3 } - 4 x ^ { 2 } + 10$
B) $- 6 x ^ { 3 } + 5 x ^ { 2 } - 8$
C) $x ^ { 3 } - 10 x ^ { 2 } - 6$
D) $- 6 x ^ { 3 } + 3 x ^ { 2 } - 6$