Which of the following is normally a lawful question to ask during an employment interview? 
 a. "Would you be willing to submit a copy of your birth certificate or baptismal record to prove your date of birth?" 
 b. "What does your father do for a living?" 
 c. "What type of discharge did you get from the service?" 
 d. "If you were starting college all over again, what courses would you take?"