In his early research on hypnotism, Binet discovered what he called "transfer," in which actions in one part of the body of a hypnotized person could be transferred to another part by passing a magnet over the person's body. Which of the following is true about this research?
a. It only happened when the hypnotized subject knew what was expected and followed the suggestion.
b. It showed that hypnotic susceptibility could be used as a mental test.
c. It was only true for people who weren't very intelligent, and this was the research that first got Binet interested in studying intelligence.
d. It established Binet's reputation as a careful and conservative scientist.