In the short tale "Emperor's New Clothes" by Hans Christian Andersen, the Emperor hires the swindlers because he loves wearing fancy clothes and a important procession is around the corner. These two swindlers promised him "the finest, best suit of clothes from a fabric invisible to anyone who is unfit for his position or hopelessly stupid". Since the Emperor's ministers didn't want to admit that they could not see the clothes, they lied to the Emperor. Eventually, the Emperor lied himself too and as a result he went naked to the procession.
Answer: The way the reader knew that the flower girl was intelligent is that:
A) She is smart enough to know what things cost and how a gentleman should treat a guest.
Explanation: The dialect of the flower girl is not a criteria for intelligence but since she could effectively know the cost of things and how a gentleman should treat a guest, she could be attributed as an intelligent person.
D in my opinion but I’m am truly sorry if you get it wrong