I wanna say that your answer is B. Let me know if you get it right!
here's your answer and I hope I helped you.
Answer:
“With one boy in particular my mother had to sit me down and explain.”
Explanation:
Perhaps this one “boy” doesn’t want to be a boy anymore and gets offended when the main character refers to them as a “guy” or was never a guy to begin with. In that case it would make sense that the boy would get offended