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AP® Calculus AB-BC

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Moderate

Which of the Series Converge?

APCALC-UBPRLY

Which of the following series converge?

I. $\sum _{ n=1 }^{ \infty }{ \cfrac { 7 }{ { 10 }^{ n } } } $
II. $\sum _{ n=1 }^{ \infty }{ \cfrac { { 3 }^{ n } }{ n } } $
III. $\sum _{ n=1 }^{ \infty }{ \cfrac { 1 }{ n! } } $

A

I only.

B

I and III.

C

II only.

D

I, II, and III.