A.It is an adverb clause modifying set.
Explanation:
I would answer nesting dolls.
"like a sunbeam" - it is used to give deeper meaning and description to what her face looks like in person so the reader can feel as if they are standing in front of her seeing that face.
Answer: If you describe someone as nonchalant, you mean that they appear not to worry or care about things and that they seem very calm.
Explanation: