Find a Polar Equation of the Conic with Its Focus $\quad$

Multiple Choice

Find a polar equation of the conic with its focus at the pole.
Conics $\quad$$\quad$ Eccentricity $\quad$$\quad$ Directrix
Ellipse $\quad\quad\quad e = 1 \quad\quad\quad y = -2$

A) $r = \frac { - 2 } { 1 - \cos \theta }$
B) $r = \frac { 2 } { 1 + \cos \theta }$
C) $r = \frac { 2 } { 1 - \cos \theta }$
D) $r = \frac { 2 } { 1 - \sin \theta }$
E) $r = \frac { 2 } { 1 + \sin \theta }$