Which One of the Following Questions Is Unlawful

Multiple Choice

Which one of the following questions is unlawful?

A) How would you react if we decided to transfer you at the end of the first six months?
B) Tell me about a time when you had to deal with an irate customer.
C) What does your spouse do for a living?
D) If you observed a fellow employee stealing something from a job, what would you do?