Experiments seem to indicate that rats can tell time. Which of these statements is evidence to support this claim?
A. Rats learn quickly in fixed interval schedules to press the lever close to the time when the interval has elapsed.
B. In fixed ratio schedules, rats learn to count how many responses will get them the reward.
C. When using variable interval schedules, the rat will begin to predict when the interval is over.
D. Rats exposed to variable ratio schedules learn to sense subtle changes in pressure as the reward is loaded into the device.
Answer: A
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