You are the local investigator for a new HIV vaccine trial that will be conducted in the region of your university. You are providing an information session at the local community health clinic for anyone interested. Given the event was announced on local radio and in newspapers, turnout is impressive. At the end of the session, a person approaches you and says: "I am very interested in the trial and I want to know more about how I can participate. I do not have HIV but I do have hepatitis C, although I use condoms regularly. Do you think that I can participate? And will you pay for condoms?" What should you respond? a. "I understand and appreciate your interest. Here is the telephone number of my clinic. Please call so we can set up an appointment with the nurse. You may take free condoms on your way out." b. "I understand and appreciate your interest. When you say that you do not have HIV, can you tell me how long ago you were tested?" c. "I understand and appreciate your interest. Let's walk over here to a corner and discuss this in private