Find the Equation of the Axis of Symmetry of the Parabola

Multiple Choice

Find the equation of the axis of symmetry of the parabola.
- $$f ( x ) = ( x + 3 ) ^ { 2 } - 1$$

A) $x = 3$
B) $x = - 3$
C) $x = 1$
D) $y = 1$