Add or Subtract as Indicated $\left(-6 x^{6}+8 x^{8}+4-8 x^{7}\right)-\left(6+5 x^{7}+5 x^{8}+8 x^{6}\right)$

Multiple Choice

Add or subtract as indicated.
- $\left(-6 x^{6}+8 x^{8}+4-8 x^{7}\right) -\left(6+5 x^{7}+5 x^{8}+8 x^{6}\right)$

A) $3 x^{8}-13 x^{7}-14 x^{6}-2$
B) $13 x^{8}-3 x^{7}+2 x^{6}-2$
C) $13 x^{8}-3 x^{7}+2 x^{6}+10$
D) $3 x^{8}-3 x^{7}+2 x^{6}+10$