Can you explain to me how this is the answer, please and thank you!

(9) Construct a 95% confidence interval for the mean amount of sugar in a bowl of cereal using the following summary statistics Summary statistics: Column n Mean : Variance Std. dev. Std. err. sugars 76 7.0263158 19.172632 4.3786564 0.50226633 Below are the critical values for a t-distribution with 75df. probability 0.3 0.15 0.10 0.05 0.025 0.01 0.005 t* 0.52 1.09 1.28 1.66 1.99 2.37 2.64 (A) [6.17, 7.83] (B) [0, 15.6] (C) [18.17, 19.83] (D) [18.05, 19.9] (E) [6.01, 8.02]