Use the Square Root Property to Solve the Equation $4 x ^ { 2 } - 60 = 0$

Multiple Choice

Use the square root property to solve the equation.
$4 x ^ { 2 } - 60 = 0$

A) $\{ 30 \}$
B) $\{ 16 \}$
C) $\{ - 15,15 \}$
D) $\{ - \sqrt { 15 } , \sqrt { 15 } \}$