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What is the sum of the geometric series:

$$\sum_{n=0}^\infty \left(-\frac{2}{5}\right)^n$$

A

$-\cfrac{5}{3}$

B

$-\cfrac{5}{7}$

C

$-\cfrac{2}{5}$

D

$\cfrac{5}{7}$

E

$\cfrac{5}{3}$

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