Pigeons and Rats Who Are Reinforced on Fixed Interval Schedules

Multiple Choice

Pigeons and rats who are reinforced on fixed interval schedules stop responding immediately after they receive a reinforcer and do not start again until just before the next scheduled reinforcement.This illustrates that animals

A) are "stuck in time."
B) cannot be as easily trained as humans on the task.
C) are cognitive time travelers.
D) are strongly influenced by circadian rhythms that can help or hinder training.