Which of the Given Series Are Absolutely Convergent? Select the Correct

Multiple Choice

Which of the given series are absolutely convergent? Select the correct answer.

A) $\sum _ { n = 1 } ^ { \infty } \frac { \sin 2 n } { n }$
B)
$\sum _ { n = 1 } ^ { \infty } \frac { \cos \frac { \pi n } { 7 } } { n \sqrt { n } }$