If the italicized sentence is <em>how eager she was to do her best, </em>then the answer would be an adverb clause.
Because the whole clause acts as an adverb.
I believe it’s option B.
hope this helps :)
Answer:
A child hero is a hero that is often depicted as a child or a child-like figure.
Explanation:
Hi! I'm super sorry that I can't help. I've never read the passage