Respuesta :
From the given sentences, the one that is the best textual evidence to Ethan to use to support his inference that Queen Elizabeth thinks Erik of Sweden is needlessly vain is the corresponding to option B, that is ''And while we perceive there from that the zeal and love of your mind towards us is not diminished, yet in part we are grieved that we cannot gratify your Serene Highness with the same kind of affection'', because here Queen Elizabeth implies that they will never have the same affection for Erik that the one he has for himself, showing that she considered him very vain.
The Queen's letter explains why she was unable to reciprocate the King's romantic affection. She was informing the King that, despite his feelings for her and his desire for them to get married, she did not feel the same way about anyone else.
Erik of Sweden is the recipient of this letter from Queen Elizabeth, who wants him to know that his affections for her are not shared and that she has no romantic sentiments for him that may result in a marriage.
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