Construct a 99% confidence interval for the population mean, μ. Assume the population has a normal distribution. A group of 19 randomly selected employees has a mean age of 22.4 years with a standard deviation of 3.8 years.

A) (17.2, 23.6)

B) (18.7, 24.1)

C) (19.9, 24.9)

D) (16.3, 26.9)