Simplify the Expression $- 16 \sqrt { 5 } - 6 \sqrt { 5 }$

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $- 16 \sqrt { 5 } - 6 \sqrt { 5 }$

A) $- 22 \sqrt { 5 }$
B) $21 \sqrt { 5 }$
C) $11 \sqrt { 5 }$
D) $- 10 \sqrt { 5 }$