单选题：根据以下材料，回答题A little boy invited his mother to attend his scho

根据以下材料，回答题
A little boy invited his mother to attend his school's first teacher-parent meeting. To the little boy's 16 ,she said she would go. This 17 be the first time that his classmates and teacher18 his mother and he felt 19 of her appearance. Although she was a beautiful woman, there was a severe scar that 20 nearly the entire right side of her face. The boy never wanted to21 why or how she got the scar.
At the meeting the people were 22 by the kindness and natural beauty of his mother 23 the scar,but the little boy was still embarrassed and 24 himself from everyone. He did,however, get within 25 of a conversation between his mother and his teacher.
The teacher asked 26, “How did you get the scar on your face?”
The mother replied 27my son was a baby,he was in a room that caught fire. Everyone was 28afraid to go in because the fire was 29, so I went in. As I was running toward his bed, I saw a long piece of wood coming down and I placed myself over him trying to protect him. I was knocked 30 but fortunately a fire-man came in and saved both of us. She31 the burned side of her face. This scar will be32 , but to this day,I have never 33 what I did.
At this point the little boy came out running toward his mother with tears in his eyes. He held her in his arms and felt a great 34of the sacrifice(牺牲)that his mother had made for him. He held her hand 35 for the rest of the day.
第16题答案是(  ) A．enjoyment
B．disappointment
C．surprise
D．excitement