Answer:
d. Begins to wash the floors after returning from outside excursions.
Step-by-step explanation:
Obsessive-compulsive disorder: The term obsessive-compulsive disorder is also referred to as OCD and is defined as the tendency of an individual to perform a particular task repeatedly over a certain period. An individual suffering from OCD gets intrusive and repetitive thoughts related to anything, for example, hand-washing, checking a locked door again and again, etc.
In the question above, the client who compulsively washes the hands, diagnosed with OCD, and being treated for the same will begins to wash the floors after returning from outside excursions to avoid excessive hand washing and this could be a part of one of the psychotherapies named ERP i,e the exposure therapy that has been suggested by the client's psychologist.