For the series ∑n=1∞(−1)nn2\sum_{n=1}^{\infty} \frac{(-1)^n}{n^2}∑n=1∞n2(−1)n, which statements are true?
It converges conditionally, and rearrangements may converge to different values
It converges absolutely because ∑n=1∞1n2\sum_{n=1}^{\infty} \frac{1}{n^2}∑n=1∞n21 converges
All rearrangements converge to the same value because of absolute convergence
Both b and c