t-test and Wilcoxon Rank Sum to compare each pair of classes (1) A vs. B, (2) A vs. C, and (3) B vs. C. Which is better for the data? Explain why.

Datum Class A Class B Class C 11 19 26 2 12 20 26 3 15 24 27 4 17 23 28 5 18 23 31 6 20 26 31 7 22 30 31 8 22 31 32 9 24 32 36 10 24 32 37 11 25 35 38 12 27 38 41 13 28 39 42 14 29 43 45 15 32 42 46 16 33 44 49 17 35 45 52 18 38 50 55