Who Is This Person and for What Is He Famous

Who is this person and for what is he famous?

A) Charles Spearman, who advanced the theory that a general intelligence factor, called the g factor, is responsible for overall intellectual functioning
B) David Wechsler, who developed the WAIS, the most widely used intelligence test.
C) French psychologist Alfred Binet, who developed the first intelligence test.
D) Lewis Terman, who translated and adapted the Binet-Simon intelligence test for use in the United States.