The correct answer is A. appropriate behavior / “I pray thee”
Explanation:
In most cases, the meaning of unknown words or unfamiliar words can be understood by analyzing the context in which they are presenting, considering the context provided in the text and the word that surround unfamiliar words provide essential clues on the meaning of this words. In the case presented, the passage introduces the content of "The Prince and the Pauper" and explains this story is about two boys one that is poor and one that is Prince that decide to trade places.
In the passage, the poor boy who is replacing the Prince is asked to sit down, but he is reluctant to do it because in the room there are older men and men who are more important. Due to this, his uncle who does not know he is not the Prince says to him "Prithee, insist not my lord; it is not meet that they sit in thy presence", this context shows the word "meet" in "it is not meet that they sit in thy presence" means that this behavior was not the most suitable or that it was not an "appropriate behavior" because the other men should stay stand and the Prince should sit. On the other hand, this context reveals the word "Prithee" means please, I beg you or "I pray thy" as the uncle asks the boy to stop insisting because it is not suitable. Thus, the word "meet" means "appropriate behavior" and the word "prithee" means "I pray thee" (Option A).