Math 152 The developer of a new nail polish designed to help children stop biting fingernails is testing their product. They collect a random sample of 1186 children identified as having a nail-biting habit, and randomly divide them into two groups. Group A, consisting of 593 children, apply the new nail polish daily for three weeks. The parents of the children in Group A are also provided a children's book about the germs that get caught under fingernails. Group B, consisting of the other 593 children, are given a "placebo" nail polish (containing no special ingredients), and are not given the book. At the end of three weeks, the number of children who stopped biting their fingernails was counted for each group. Based on the results, the company declared the new nail polish "successful" since more children from Group A stopped biting their fingernails than from Group B. Which of the following problems applies to this study? Select the best answer. Confounding: the researchers do not know whether the new nail polish is the actual reason that Group A had more children quit the habit. Replication: the sample size for this study is too small for the results to be