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  3. What does the professor mean by the following statement: After hitting a bar several times with similar results, an animal learn

What does the professor mean by the following statement: After hitting a bar several times with similar results, an animal learn

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问题 What does the professor mean by the following statement:
After hitting a bar several times with similar results, an animal learns that it can get food by pressing the bar.
选项 A、An animal is able to press the bar more after it is fed three or four times.
B、Three or four animals are used in the experiment with similar results.
C、There are several trials by an animal before the food is released.
D、An animal learns how to get food by hitting a bar.
答案D
解析
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