As you are speaking with a new client in person, you observe some odd facial expressions. What should you conclude from this?

a. These are hints that the client would like you to change the subject.
b. These are cues that you should take as hints, along with other information.
c. These are cues indicating the client is not interested in what you are saying.
d. These are cues indicating the client is trying to decide whether or not to believe you.