Answer:
The given options are wrong in the question.
The options should have been --
systematic desensitization; exposure
exposure; response prevention
response prevention; exposure
response prevention; systematic desensitization
The answer is --
response prevention; exposure
Step-by-step explanation:
ERP stands for Exposure response prevention. It is therapy used to treat OCD disorder in humans.
In the context, Alexis who was diagnosed with OCD is asked by the therapist to lock the door and then the therapist takes away the keys. Here, the exposure is locking the door and response prevention is the taking away the door keys.
By doing this, ERP teaches an individual that their distress can be tolerable without turning them into compulsions. Exposure response prevention is considered to be the most effective way to treat OCD.