Below you are given six polar equations and plots of four of these curves. Match each plot with the correct equation. (Note: Values along the axes are given in Cartesian coordinates.)

A. $r=1+2\sin(\theta/2)\;$ (nephroid of Freeth)
B. $r=\sqrt{1-0.8\sin^2(\theta)}\;$ (hippopede)
C. $r=e^{\sin(\theta)}-2\cos(4\theta)\;$ (butterfly curve)
D. $r=\sin^2(4\theta)+\cos(4\theta)$
E. $r=2-5\sin(\theta/6)$
F. $r=\cos(\theta/2)+\cos(\theta/3)$

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