Simplify the Radical Expression $- \sqrt { \frac { 576 } { 25 } }$

Multiple Choice

Simplify the radical expression. Indicate if the expression is not a real number.
- $- \sqrt { \frac { 576 } { 25 } }$

A) $\frac { 24 } { 5 }$
B) Not a real number
C) $- \frac { 24 } { 5 }$
D) $- \frac { 288 } { 12 }$