​A Psychologist Is Teaching a Woman with Intellectual Disabilities the Skills

​A psychologist is teaching a woman with intellectual disabilities the skills that she needs to clean her apartment.Training sessions are conducted in the woman's apartment,and the psychologist provides reinforcers when the woman demonstrates the proper cleaning skills.Which strategy for promoting generalization is the psychologist using?

A) ​teaching a range of functionally equivalent responses
B) ​reinforcing occurrences of generalization
C) ​training skills that contact natural contingencies of reinforcement
D) ​incorporating common stimuli into the training session