阅读下列短文, 从给的四个选项 (A、B、C和D) 中, 选出最佳选项。
(2013·哈尔滨市质检，B)
Bursting into the classroom from recess (课间休息), 15 children take their seats and face the woman they know as Ms. Yang.
“What day is it today？” she asks, in Mandarin Chinese (普通话)．
“Confucius' birthday！” the fifth graders shout in Mandarin.
