The audience whistled and shouted,waiting for her to sing one ( ) song

问题描述:

The audience whistled and shouted,waiting for her to sing one ( ) song
4选1
A last B final C ending D concluding
A 和 B的区别在哪里啊?我错选B了

last是最后的
final是最终的
如果是final song,感觉是她要退出歌坛,而唱的绝唱了.