Add or Subtract as Indicated $\left(-8-2 x^{3}+4 x^{5}+4 x^{4}\right)+\left(5 x^{4}-4 x^{3}-9+3 x^{5}\right)$

Multiple Choice

Add or subtract as indicated.
- $\left(-8-2 x^{3}+4 x^{5}+4 x^{4}\right) +\left(5 x^{4}-4 x^{3}-9+3 x^{5}\right)$

A) $-3 x^{5}-3 x^{4}-5 x^{3}+7$
B) $7 x^{10}+9 x^{8}-6 x^{6}-17$
C) $10 x^{24}-17$
D) $7 x^{5}+9 x^{4}-6 x^{3}-17$