The correct answer is letter D
Granville Stanley Hall was a psychologist, perhaps best known as the first American to earn a Ph.D. in psychology and the first president of the American Psychological Association (APA). He also had a significant influence on the early development of psychology in the United States. Through his work as a teacher, he influenced a number of other psychologists, including John Dewey and Lewis Terman.
Perhaps Granville Stanley Hall's greatest contribution to psychology is the development and growth of early childhood as an independent science. By the year 1898, Granville Stanley Hall had supervised 30 of the 54 PhDs that had been awarded in the United States. Some of those who studied under his influence include Lewis Terman, John Dewey, and James McKeen Cattell.