Simplify the Expression $$- \sqrt { 54 }$$ A) 7
B) $- 3 \sqrt { 6 }$

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $$- \sqrt { 54 }$$

A) 7
B) $- 3 \sqrt { 6 }$
C) not a real number
D) $- 9 \sqrt { 6 }$