Solve the Equation by Using the Square Root Property $$( 2 z - 4 ) ^ { 2 } + 12 = 4$$

Multiple Choice

Solve the equation by using the square root property. $$( 2 z - 4 ) ^ { 2 } + 12 = 4$$

A) $\{ 2 \sqrt { 2 } - 4 \}$
B) $\{ 2 \sqrt { 2 } + 4 \}$
C) $\{ 2 + i \sqrt { 2 } , 2 - i \sqrt { 2 } \}$
D) $\{ 4 + 2 \sqrt { 2 } , - 4 + 2 \sqrt { 2 } \}$