In Developing an Interval Estimate for a Population Mean, the Interval

In developing an interval estimate for a population mean, the interval estimate was 62.84 to 69.46. The population standard deviation was assumed to be 6.50, and a sample of 100 observations was used. The mean of the sample was: $\begin{array}{|l|l|}\hline\text { A. } & 56.34 . \\\hline \text { B. } & 62.96 . \\\hline \text { C. } & 13.24 . \\\hline \text { D. } & 66.15 .\\\hline\end{array}$