human
If an  = , which of the following series is absolutely convergent?
(            ) Given reasons for your answer.
(A)  ∑=1(−1)n an                 (B)  ∑=1 an an+1              (C)  ∑=1(an+1−an )
(D)  ∑=1(an+1+an )
gpt
--- Reasoning ---
1. Is the question multiple-choice question?
Yes

--- Answer ---
grounded