Simplify the Expression $- \sqrt { 112 }$ A) 10
B) Not a Real Number
C)

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $- \sqrt { 112 }$

A) 10
B) not a real number
C) $- 4 \sqrt { 7 }$
D) $- 16 \sqrt { 7 }$