One of Mr. Horton, his wife, their son, and Mr. Horton’s mother is a doctor and another is a lawyer. a) If the doctor is younger than the lawyer, then the doctor and the lawyer are not blood relatives. b) If the doctor is a woman, then the doctor and the lawyer are blood relatives. c) If the lawyer is a man, then the doctor is a man. Whose occupation you know?

• A. Mr. Horton: he is the doctor
• B. Mr. Horton’s son: she is the lawyer
• C. Mr. Horton: he is the doctor
• D. Mr. Horton’s mother: she is the doctor