Consider the series n=1∑∞n2+n3n+5. Which of the following best describes its behavior?
a) It converges, because its terms behave like those of a p-series with p>1.
b) It diverges, because its terms do not approach zero.
c) It diverges, because its terms behave like those of the harmonic series.
d) It converges by the Ratio Test since n→∞limanan+1<1.