Answer:
the first one is A, the second is C, and the third is A, the fourth is C and the last is D
Null hypothesis is the hypothesis that the effect relationship, or the other manifestations of variables and data under investigation does not exist.
I null hypothesis , a study is started in which an assumption is made that there is no difference between the experimental and control groups.
This assumption of no difference between between the experimental and control groups is known as null hypothesis.
If the results of the study indicate a P value, it indicates that there is a difference between the groups and it is determined with the help of the P value that this difference is due to chance.
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I think it might be illnesses or bacteria. that would be my guess.
B. because if there’s something wrong with the muscles and strength that can come from heart health and lead up to more problems
