Suppose a Large Labor Union Wishes to Estimate the Mean

Suppose a large labor union wishes to estimate the mean number of hours per month a union member is absent from work. The union decides to sample 343 of its members at random and monitor the working time of each of them for 1 month. At the end of the month, the total number of hours absent from work is recorded for each employee. Which of the following should be used to estimate the parameter of interest for this problem?

A) A large sample confidence interval for μ.
B) A small sample confidence interval for μ.
C) A large sample confidence interval for p.
D) A small sample confidence interval for p.