In 2000 There Were Almost 300,000 Canadians with More Than $\mu$

Multiple Choice

In 2000 there were almost 300,000 Canadians with more than 1 million dollars in financial assets! If the average age of one hundred randomly selected millionaires was 54.8 years with a standard deviation of 7.9 years, what is the 95% confidence interval for the mean age, $\mu$ of all Canadian millionaires?

A) $53.5 < \mu < 56.1$
B) $53.3 < \mu < 56.3$
C) $52.8 < \mu < 56.8$
D) $51.7 < \mu < 57.7$