haha I need help with my quiz that has this question too. but your learning this in college? I'm in eight grade.
Answer: B. It reveals the trust the young man has in the princess.
"As I would a child" would generally refer to how they would treat something like a child--carefully. "As I would a lifeless doll" would refer to how they would treat something like a lifeless doll; perhaps with care, but not with the gentle touch they would a child.