Final answer:
The role of a BACB credentialed individual who delivers services under the direction of a BACB approved supervisor is A) RBT, Registered Behavior Technician.
Step-by-step explanation:
The role of a BACB credentialed individual who delivers services under the direction of a BACB approved supervisor is A) RBT, Registered Behavior Technician. An RBT is responsible for implementing behavior analysis programs and interventions with individuals under the supervision of a BCBA, Board Certified Behavior Analyst. They work directly with clients, collecting data and implementing treatment plans.