Which of the Following Series Converges?
1) $\sum _ { n = 1 } ^ { \infty } n ^ { - n }$

Multiple Choice

Which of the following series converges?
1) $\sum _ { n = 1 } ^ { \infty } n ^ { - n }$
2) $\sum _ { n = 1 } ^ { \infty } e ^ { 100 - n }$
3) $\sum _ { n = 1 } ^ { \infty } \frac { n ^ { n } } { n ! }$

A) None
B) 1
C) 2
D) 3
E) 1, 2
F) 1, 3
G) 2, 3
H) 1, 2, 3