2. Given the polar equation of a conic section is $\rho=\frac{5}{3-2 \cos \theta}$, then the distance from the focus to the corresponding directrix is
A. 5
B. $\frac{5}{2}$
C. $\frac{5}{3}$
D. $\frac{2}{3}$
2. B $\rho=\frac{\frac{2}{3} \cdot \frac{5}{2}}{1-\frac{2}{3} \cos \theta}$, so the distance from the focus to the corresponding directrix is $\frac{5}{2}$.