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.
Menstruation im pretty sure or maybe puberty but probs the first one
Answer: B) He wanted to portray the rebels as brave heroes who fought for their freedom.
Explanation: Got it Right on Edge.
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