Answer:
its bad for him his health is not improving.
Explanation:
Answer:
B, C, E
Explanation:
I believe it's those ones, they seem to be the most obivious! :)
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.
