APFIVE Alternating Series Convergence
Which of the following series converges?
A
$$\sum_{n=1}^{\infty} (-1)^n \left( \frac{1 - n}{n} \right)$$
B
$$\sum_{n=1}^{\infty} (-1)^n \left( \frac{2\sqrt{n}}{n} \right)$$
C
$$\sum_{n=1}^{\infty} (-1)^n \left( \frac{n^2}{3\sqrt{n}} \right)$$
D
$$\sum_{n=1}^{\infty} (-1)^n \left( \frac{n + 1}{2n} \right)$$
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