Answer:
(A) When talking to others, young children often fail to take their listeners' knowledge and perspectives into account.
Explanation:
A five-year-old is still in the process of intellectual development, so she is not yet able to identify perspectives and make logical associations, such as the fact that two people she knows but who are in different environments do not know each other, like the case of the teacher and a personal friend. Adults know this and should seek to develop these skills in children, but in a natural and healthy manner.
This was actually a very smart behaviour. This way the law was accessible to everyone so on one hand, noone could say "I didn't know" and on the other hand it could be used for reference by anyone and people would not need to seek council in every matter. This also decreased the possibility to abuse power (if the law was only accessible to few, those few could abuse their power by manipulating it in their favour).