Answer: Option 'a' is correct.
Explanation:
Researchers can isolate a single factor and examine the effect of that factor alone on a particular behavior through use of a choices is an experiment.
As experiment means when a hypothesis is tested scientifically and check when the cause is changed what would effect that factor alone.
whereas correlational study is the study of two variables understand it and develop the statistical relationship between them without affecting from any variable.
Hence, option 'a' is correct.

A state government increasing tax rates. This is an example of economic policy.
Thanks
Could you pls link a photo or something? i was pretty good in social studies so i’d be happy to help but theres no image :)
Answer:
James Madison was of the opinion that majority rule would cause an imbalance in the distribution of wealth which would favor the wealthy individuals of the society at the expense of the poor and middle-class families.
James Madison called it the "tyranny of the majority" and proposed that checks and balances would exist within the Republic to protect the interest of the majority and minorit