Question

what twentieth century scientist revolutionized the study of psychology?
albert einstein
sigmund freud
alexander fleming
philo farnsworth

Explanation:

Sigmund Freud developed psychoanalysis, a major school of thought in psychology, introducing concepts like the unconscious mind, defense - mechanisms, and psychosexual development in the 20th century. Einstein was a physicist, Fleming discovered penicillin (in the field of medicine), and Farnsworth was involved in the development of television technology.

Answer:

B. Sigmund Freud