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 51 reduced-fat cookies and test them in a lab,constructing the following confidence interval:
T-Interval for μ: with 90.00% Confidence,2.3 < μ(grams of fat) < 3.4

A) 0.55 grams of fat
B) 2.85 grams of fat
C) 1.48 grams of fat
D) 1.10 grams of fat
E) Not enough information is given.