Does 30 Minutes of Meditation Every Day Provide Significant Improvement

Does 30 minutes of meditation every day provide significant improvement in mental performance? To investigate this issue, a researcher conducted a study with 150 adult subjects who meditated for 30 minutes each day for a period of 6 months. At the end of the study, 300 variables related to the mental performance of the subjects were measured on each subject, and the means compared to known means for these variables in the population of all adults. Sixteen of these variables were significantly better (in the sense of statistical significance) at the α= 0.05 level for the group who performed 30 minutes of meditation each day as compared to the population as a whole, and 3 variables were significantly better at the α= 0.01 level for the group who performed 30 minutes of meditation each day as compared to the population as a whole. What would be the correct conclusion?

A) There is very good statistical evidence that 30 minutes of meditation each day provides some improvement in mental performance.
B) There is very good statistical evidence that 30 minutes of meditation each day provides some improvement for the variable that was significant at the α= 0.01 level. We should be somewhat cautious about making claims for the variables that were significant at the α= 0.05 level.
C) These results would have provided very good statistical evidence that 30 minutes of meditation each day provides some improvement in mental performance if the number of subjects had been larger. It is premature to draw statistical conclusions from studies in which the number of subjects is smaller than the number of variables measured.
D) None of these options is correct.