For each of the series below select the letter from a to c that best applies and the letter from d to k that best applies. A possible answer is af, for example.

**A.** The series is absolutely convergent.

**B.** The series converges, but not absolutely.

**C.** The series diverges.

**D.** The alternating series test shows the series converges.

**E.** The series is a \(p\)-series.

**F.** The series is a geometric series.

**G.** We can decide whether this series converges by comparison with a \(p\) series.

**H.** We can decide whether this series converges by comparison with a geometric series.

**I.** Partial sums of the series telescope.

**J.** The terms of the series do not have limit zero.

**K.** None of the above reasons applies to the convergence or divergence of the series.

f(n)=cos^2(npi)/(npi)

n from 1 to infinity

I know it is divergent by harmonic series, however CK is not the correct answer.