Perform the Indicated Operations and Simplify A) $9 x ^ { 5 } - 18 x ^ { 4 } - 6 x ^ { 3 } + 9$

Multiple Choice

Perform the indicated operations and simplify.
- $$\begin{array} { r } 5 x ^ { 5 } - 9 x ^ { 4 } + 2 x ^ { 3 } + 3 \\+ \left( 4 x ^ { 5 } - 9 x ^ { 4 } - 8 x ^ { 3 } + 6 \right) \\\hline\end{array}$$

A) $9 x ^ { 5 } - 18 x ^ { 4 } - 6 x ^ { 3 } + 9$
B) $- 15 x ^ { 24 } + 9$
C) $- 6 x ^ { 5 } - 6 x ^ { 4 } + 11 x ^ { 3 } - 5$
D) $9 x ^ { 10 } - 18 x ^ { 8 } - 6 x ^ { 6 } + 9$