Answer: Lenny is most likely in a PLACEBO CONTROL GROUP.
Explanation: A placebo control group can be defined as a process in research methods whereby an inert treatment is given to one group of participants whereby the real treatment is tested in another group.
This can be said of Lenny. Seeing a therapist weekly but no gradual exposure is an effect of a placebo control group.
The placebo control group is a way of testing Medicine or a form of treatment.