Use the Square Root Property to Solve the Equation $( x + 1 ) ^ { 2 } = - 63$

Multiple Choice

Use the square root property to solve the equation.
$( x + 1 ) ^ { 2 } = - 63$

A) $\{ - 1 - 3 \sqrt { 7 } , - 1 + 3 \sqrt { 7 } \}$
B) $\{ - 1 - 3 i \sqrt { 7 } , - 1 + 3 i \sqrt { 7 } \}$
C) $\{ 3 i \sqrt { 7 } - 1,3 i \sqrt { 7 } + 1 \}$
D) $\{ 1 - 3 \mathrm { i } \sqrt { 7 } , 1 + 3 \mathrm { i } \sqrt { 7 } \}$