Catherine runs a weekly meeting of Alcoholics Anonymous, and several dozen members come every week. In addition, each week some new members show up to see what the group is all about, and some members who were there the previous week do not return. Which of the following is most likely true about Catherine?

a. Catherine has likely experienced some problems with alcohol in her past and is probably not a professional therapist.

b. Catherine is probably a licensed psychologist.

c. Catherine is probably a licensed psychiatrist.

d. Catherine has probably never experienced a substance-related problem herself.