Scientists developed a new margarine containing plant ingredients they think will lower blood cholesterol levels in people who use the margarine. they want to test this by comparing the cholesterol levels of people who use the new margarine for a while to cholesterol levels of a group of people who use regular margarine. this is an example of what type of research design?

Intervention study

Explanation:

The goal of Intervention studies is to measure the efficacy of a particular treatment or preventive measure by allocating individual subjects to one or more prevention and treatment options.

In applied psychology, the interventions are actions carry out to bring change in people. these interventions are not directed towards treating a problem or condition but are directed to foster healthy attitudes, emotions, and habits. These can improve the quality of living even in the absence of mental illness.

good question. i'll be looking into that. (this is a joke sir)

i believe your answer is mountains.