How Much Fat Do Reduced Fat Cookies Typically Have? You

How much fat do reduced fat cookies typically have? You take a random sample of 120 reduced-fat cookies and test them in a lab,finding a mean fat content of 3.2 grams and a standard deviation of 1.9 grams of fat.Create a 99% confidence interval for the mean grams of fat.

A) (2.10,4.30)
B) (2.75,3.66)
C) (2.79,3.61)
D) (2.78,3.62)
E) (2.80,3.60)