Explanation:
Contamination can have undesirable consequences in real experiments, some of them are related to the feelings that may arise in the research participants, the contamination bias reduces the differences between the research groups, and can cause a comparison between the treatments of each different group, the which can generate conflicts and rivalries on the part of groups that consider themselves to be inferior to others. These contamination-related problems can significantly interfere with the research results.
The divine right of kings states that no monarch rules by any earthly authority but that they were given the right to rule by the will of GOD, hence the term DIVINE right
The answer is D hope i helped
