inference question

0 In an experiment, two-year-old boys and their fathers made pie dough together using rolling pins and other utensils. Each father-son pair used a rolling pin that was distinctively different from those used by the other, "father-son pairs, and each father repeated the phrase "rolling pin" each time his son used it. But when the children were asked to identify all of the rolling pins among a group of kitchen utensils that included several rolling pins, each child picked only the one that he had used.02br
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00　　Which one of the following01b00 inferences02b00 is most supported by the information above？02br
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00　　（A） the children did not grasp the function of rolling pin.02br
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00　　（B） No two children understood the name "rolling pin" to apply to the same object02br
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00　　（C） The children understood that all rolling pins have the same general shape.02br
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00　　（D） Each child was able to identify correctly only the utensils that he had used.02br
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00　　（E） The children were not able to distinguish the rolling pins they used from other rolling pins.02br
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00I pick 'd'02br
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00What did you think?02br
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00Thank you 0-