Bob, a 10^th Grade Student, Participates in a Research Study

Bob, a 10^th grade student, participates in a research study about exclusion of a person as a friend, as a member of a club, or from a school. Which of the following is probably NOT characteristic of Bob?

A) Bob stated that exclusion from a school on the basis of gender or race is unacceptable.
B) Bob stated that it is less negative to exclude a girl from Boy Scouts than it is to exclude someone from Boy Scouts because of his race.
C) Bob has never excluded someone as a friend.
D) Bob's responses to the study were less negative this year, as a 10th grader, than they would have been when he was in elementary school.