Add or Subtract as Indicated $\left(-2 r^{4}+9 r^{3}-3 r\right)-\left(8 r^{4}-9 r^{3}+6 r^{2}-2 r\right)$

Multiple Choice

Add or subtract as indicated.
- $\left(-2 r^{4}+9 r^{3}-3 r\right) -\left(8 r^{4}-9 r^{3}+6 r^{2}-2 r\right)$

A) $-6 r^{4}-6 r^{2}+r$
B) $10 \mathrm{r}^{4}-18 \mathrm{r}^{3}+6 \mathrm{r}^{2}+\mathrm{r}$
C) $6 r^{4}+6 r^{2}-r$
D) $-10 r^{4}+18 r^{3}-6 r^{2}-r$