Find the Standard Form of the Equation of the Parabola $( 0,3 )$

Multiple Choice

Find the standard form of the equation of the parabola.
-Focus at $( 0,3 )$ , directrix $y = - 3$

A) $y ^ { 2 } = 12 x$
B) $y ^ { 2 } = 3 x$
C) $y = \frac { 1 } { 3 } x ^ { 2 }$
D) $y = \frac { 1 } { 12 } x ^ { 2 }$