Graph the Expression on Each Side of the Equals Symbol $\frac { - \sqrt { 6 } + \sqrt { 2 } } { 4 }$

Multiple Choice

Graph the expression on each side of the equals symbol to determine whether the equation might be an identity.
-sin 15°

A) $\frac { - \sqrt { 6 } + \sqrt { 2 } } { 4 }$
B) $\frac { - \sqrt { 6 } - \sqrt { 2 } } { 4 }$
C) $\frac { \sqrt { 6 } + \sqrt { 2 } } { 4 }$
D) $\frac { \sqrt { 6 } - \sqrt { 2 } } { 4 }$