I'm pretty sure it is Theme.
Theme is the central topic of the text. passage, story, or anything else. So it may possibly also be the same for the underlying meaning and universal truth...but again, I am not sure.
Answer:
something that is usual, typical, or standard
Explanation:
I think it would be A, because she could've kept it to herself but she was honest with him and gave it to him. I know for a fact the answer is NOT C or D. But i'm 95% sure it's A
