A Study Randomly Assigned 200 Lab Rats to 20 Different

A study randomly assigned 200 lab rats to 20 different groups: 2 control groups and 18 treatment groups in which the rats were fed various amounts of genetically modified corn exposed to the pesticide Roundup. The researchers ran a separate hypothesis test for each group and found a significant (P-value < 0.05) number of tumors for 2 treatment groups. The published findings received some criticism. Here is a quote about this study: "[T]he fact that such clusters of tumors didn't show up in the two small control groups could easily be due to random chance." What does this quote refer to?

A) The possibility that the lack of statistical significance in the control groups is a Type I error
B) The possibility that the lack of statistical significance in the control groups is a Type II error
C) The certainty that the lack of statistical significance in the control groups is a Type I error
D) The certainty that the lack of statistical significance in the control groups is a Type II error