The distance of the point $\theta$ on the ellipse $\frac{x^2}{a^2} + \frac{y^2}{b^2} = 1$ from a focus is
- A$a(e + \cos \theta)$
- B$a(e - \cos \theta)$
- C$a(1 + e \cos \theta)$
- D$a(1 + 2e \cos \theta)$
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