Answer:
A. Cohort study
Explanation:
It is basically a cohort study because in this we can evaluate the incident rate at a particular time for a particular disease. .
Okay well..Let's say that you were in the hospital because you fell down some stairs and you broke your leg..The doctor would hand you a treatment plan form that states what they are going to do to help treat you.
Basically, a treatment plan form is a form that tells you what you need to do/what is going to happen to make you well again.
Answer:
Dr. Reside's experiment can not be considered effective because his study has only treatment subjects group and lack of control group. That's why his study can be very good but not valid without control group.
In his study, he concluded that 80% children after therapeutic treatment decreased the activity level which can be true but not valid without control group because when he use control group in his study then we will be able to compare the normal or control group and treatment group. Then the study will be valid and effective as well.
My guess is A, but I don't know for sure.