The answer is not B

Below are dot plots from five different samples. Which sample does not satisfy the Large sample/Normal condition for performing one-sample t-procedures? Sample sizes: A: n = 34; B: n = 32; C: n = 27; D: n = 10; E: n = 12 B : : . . . D E . .... . 6 9 12 15 18 21 Select one: O a. Sample D O b. Sample E x O c. Sample C O d. Sample B O e. Sample A