Which of the Following Would Constitute a Violation of the Ethical

Which of the following would constitute a violation of the ethical standard of confidentiality?

A) At a conference, a psychologist presents the neuropsychological assessment scores for an Alzheimer's patient, telling the audience only that the data came from "a 64-year-old Caucasian male."
B) A professor shows a portion of a therapy session with one of his clients during a graduate seminar, after having obtained the client's consent to do so.
C) A study author indicates that participants were 203 undergraduate students enrolled in introductory psychology at the university during fall 2011.
D) None of the above scenarios involves a breach of confidentiality.