Discuss the equation and graph it.r = 
A. directrix perpendicular to polar
axis 1 left of pole
focus (0, 0), vertex 
B. directrix parallel to polar
axis 1 above pole
focus (0, 0), vertex 
C. directrix parallel to polar
axis 1 below pole
focus (0, 0), vertex 
D. directrix perpendicular to polar
axis 1 right of pole
focus (0, 0), vertex 
Answer: A
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