The Value We Use for the Standard Error of the Mean

Multiple Choice

The value we use for the standard error of the mean when $n$ is at least $5 \%$ of the population size is

A) $\frac{\sigma}{\sqrt{n}} \sqrt{\frac{N-n}{N-1}}$ .
B) $\sigma$ .
C) $\frac{\sigma}{\sqrt{n}}$ .
D) $s$ .