Skinner's Operant Conditioning Procedure Became Known as _____ Procedure Because

Multiple Choice

Skinner's operant conditioning procedure became known as _____ procedure because _____.

A) an instrumental; the consequences are free
B) the free operant; the animal is free to respond at any rate
C) an instrumental; the animal is free to enter or leave the chamber
D) the adjunctive; the experimenter is free to observe the rat's behavior