Perform the Indicated Operation $$\begin{array} { r } 6 a ^ { 5 } - 5 a ^ { 3 } \\- 2 a ^ { 5 } - 5 a ^ { 3 } \\\hline\end{array}$$

Multiple Choice

Perform the indicated operation.
- $$\begin{array} { r } 6 a ^ { 5 } - 5 a ^ { 3 } \\- 2 a ^ { 5 } - 5 a ^ { 3 } \\\hline\end{array}$$

A) $8 a ^ { 5 } - 10 a ^ { 3 }$
B) $8 a ^{10 }- 10 a^ 6$
C) $- 2 a ^{16}$
D) $- 2 a ^ { 8 }$