Find the Axis of Symmetry of the Parabola Defined by the Given

Multiple Choice

Find the axis of symmetry of the parabola defined by the given quadratic function.
- $$f ( x ) = x ^ { 2 } + 5$$

A) $x = 0$
B) $x = 5$
C) $x = - 5$
D) $\mathrm { y } = 5$