70. Teacher Chang noticed that his student, Kitty, looked a bit upset. He invited Kitty for an individual counseling session, but got rejection. He then respected Kitty’s decision and did not push her more. Which one of the following statements describes his practice the best? (A) Protect professional integrity. (B) Protect students from harm. (C) Respect students’ autonomy. (D) Maintain students’ confidentiality.