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 words all are what Christ wants and tolerance you tolerate ppl put up with them
If a researcher is seeking clear, unambiguous answers, the
type of data that the researcher is likely seeking is a survey. Surveys are comprises
with clear and unambiguous answers in which each respondent who participated
provides the answer of each questions placed on the questionnaire.
