The distance between the directrices of the ellipse \( \frac{x^{2}}...

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The distance between the directrices of the ellipse \( \frac{x^{2}}{4}+\frac{y^{2}}{9}=1 \) is
\( \mathrm{P} \)
(A) \( \frac{9}{\sqrt{5}} \)
(B) \( \frac{24}{\sqrt{5}} \)
W
(C) \( \frac{18}{\sqrt{5}} \)
(D) None of these
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