According to the behaviorists

a. the predominant area of research should be free will and the mind

b. psychological research needs to emphasize the unconscious underpinnings of behavior

c. observable behavior and the role of environment are determinants of behavior

d. researchers should focus on the interaction between nature and nurture

c. observable behavior and the role of environment are determinants of behavior

Explanation:

Beheavorism is a scientific school of thought that believes that the behavior of human beings is a direct risponse to the enviroment and how it interacts with the person, as well as a direct reflect of the person or animal history, that´s why a behaviorist would say that observable behavior and the role of environment are determinants of behavior.

answer; ///biological psychologists;