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.
Answer: Ok so there's no number or letter answers but the answer is C. Hope this helps :)
Explanation:
Asphyxiation because it is a condition caused by lack of oxygen, which causes one to choke.
