Write a Polar Equation of an Ellipse with Eccentricity $0.3$ And Directrix

Multiple Choice

Write a polar equation of an ellipse with eccentricity $0.3$ and directrix $y = - 7$

A) $r= \frac { 7 } { 10 - 3 \sin \theta }$

B) $r= \frac { 2 } { 1 - 3 \sin \theta }$

C) $r= \frac { 21 } { 10 + 3 \sin \theta }$

D) $r = \frac { 21 } { 10 - 3 \sin \theta }$

E) $r= \frac { 21 } { 10 - 3 \cos \theta }$