For each of the following, determine if the series converges.
*Be sure that you can rigorously demonstrate your
answer!*

**A.**

This sum
** A. ** converges** B. ** diverges

**B.**

This sum
** A. ** converges** B. ** diverges

**C.**

This sum
** A. ** converges** B. ** diverges

**D.**

This sum
** A. ** converges** B. ** diverges

You can earn partial credit on this problem.