Find the Vertex, Focus, and Directrix of the Parabola $y = - 3 x ^ { 2 }$

Multiple Choice

Find the vertex, focus, and directrix of the parabola. $y = - 3 x ^ { 2 }$

A) Vertex: (0,0) ; Focus: $\left( 0 , - \frac { 1 } { 12 } \right)$ ; Directrix: $y = - \frac { 1 } { 12 }$
B) Vertex:(0,0) ; Focus: $\left( 0 , - \frac { 1 } { 12 } \right)$ ; Directrix: $y = \frac { 1 } { 12 }$
C) Vertex: (0,0) ; Focus: $\left( 0 , \frac { 1 } { 3 } \right)$ ; Directrix: $y = \frac { 1 } { 3 }$
D) Vertex: (0,0) ; Focus: $\left( 0 , \frac { 1 } { 12 } \right)$ ; Directrix: $y = \frac { 1 } { 12 }$
E) Vertex: (0,0) ; Focus: $\left( 0 , - \frac { 1 } { 3 } \right)$ ; Directrix: $y = \frac { 1 } { 3 }$