The table shows the number of practice problems completed in 30 minutes in three samples of 10 randomly selected math students. Number of practice problems completed In 30 minutes Sample 1 18 15 17 17 18 | 13 | 17 16 | 16 | 14 | 18 Mean = 16.2
Sample 2 21 20 18 20 19 19 20 21 21 20 Mean = 19.9
Sample 3 | 14 16 18 13 | 18 | 16 | 16 | 17 | 19 | 19 Mean = 16.6

Which statement is most accurate based on the data?

A. A prediction based on the data is reliable, because the means of samples 1 and 3 are very close together.
B. A prediction based on the data is not completely reliable, because the means of samples 1 and 3 are too close together.
C. A prediction based on the data is reliable because there are no noticeable differences among the samples
D. A prediction based on the data is not completely reliable because the meaning of sample 2 is noticeably higher than the means of the other two samples. : ))​