Answer: d. double-blind
Explanation:
A double blind study can be define as the study in which both the researcher and participant do not know which participant is receiving a particular treatment. This method is useful as it prevents the bias in the results of the experiment.
The given situation is the example of double-blind study. Here, the participants as well as the researcher do not know which group of subject are receiving bacteria in the yogurt and which group is not receiving.
Because each culture has its own sets of beliefs and disbeliefs that can influence a person.
True. Your thesis statement should give your audience a general idea about what you are about to tell them.
True
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