points) An experiment tested the hypothesis that a specific GABA receptor type (the GABA-A receptor) was necessary for a pain-relief drug to be effective. In this study, a typical strain of adult mice was compared with a group of genetically abnormal adult mice that were missing the GABA-A receptor. These genetically abnormal mice exhibited profound social anxiety and thus had to be raised to adulthood with minimal contact with other mice. On the other hand, the typical mice were raised to adulthood in same-sex groups of 4 mice per cage. For the experiment, both types of mice were randomly assigned to receive an injection of the pain-relief drug or no injection at all (a betwee subjects manipulation of the drug treatment). Then behavioral responses to pain (latency of forepav withdrawal from harmful heat) were assessed in each mouse 1 hour following injection/no injection The researchers found that behavioral responses to pain were not different between the mice that received the drug and those that did not receive the drug - this was true for both the typical mice the genetically abnormal mice.(A) Identify one problem that you see with the comparison between the genetically abnormal m and the typical mice (1 point).(B) Identify one problem that you see with the comparison between mice that receive the dru mice that do not (1 point)(C) What procedure could you change to address the problem you identified in part B? (1 p(D) Explain how a reverse design confound may explain the null results (no significant pair in the drug versus no drug conditions). (1 point)Please clearly label the parts of your answer as (A), (B), (C), or (D).