If a Client Were to Ask You a Hypothetical Question

If a client were to ask you a hypothetical question during an interview, such as "What would happen, in a lawsuit such as mine, if the plaintiff was not watching the road when the accident occurred?' you should

A) answer the question, if you know the answer.
B) tell him or her you don't know the answer, if you don't know the answer.
C) tell him or her you cannot give legal advice but will relay the question to your supervising attorney.
D) None of these choices is correct.