Solve $x ^ { 2 } + 28 = 0$ By the Square Root Property

Multiple Choice

Solve $x ^ { 2 } + 28 = 0$ by the square root property.

A) $\{ \pm 7 i \sqrt { 2 } \}$
B) $\{ \pm 2 i \sqrt { 7 } \}$
C) $\{ \pm 7 \sqrt { 2 } \}$
D) $\{ \pm 2 \sqrt { 7 } \}$