The passage states which one of the following?

Hi! I would like to know how we can determine that answer B is the most strongly supported answer when some children could have been given the same rolling pin, meaning that some of the children did identify the same object as the others if at least one of the other children had the same rolling pin. This would contradict the idea that "no two children understood the name rolling pin to apply to the same object." While I understand the issue with interchanging the terms "utensils" and "rolling pins" for answer D, it seemed to be best supported by the passage since we know for a fact that the children used rolling pins as one of their utensils. Of course, this does not account for all utensils, but considering there is an alternative explanation for answer B, I do not understand how to conclusively determine that B is the stronger answer. Thank you in advance!