Respuesta :
Xavier's entrance into the story sheds light on Ava's relationship with her parents is the author move the story forward. Coldness is the word has the most similar meaning to nonchalance in this sentence. Hence, option C and A are correct.
What is meant by nonchalance?
They don't care about anything or aren't concerned about something, nonchalant people are at ease and composed. Nonchalant is frequently synonymous with the words calm, collected, imperturbable, and unruffled.
The word nonchalant emphasizes an effortless coolness of demeanour or casualness that connotes indifference or unconcern, whereas all of these phrases signify free from tension or excitement."
Thus, option C and A are correct.
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