Attention， please.Northwest Airlines flight NW22 to Tokyo， Honolulu and Los Angeles is now boarding.Passengers in the first class， please proceed to the boarding gate now.此处的广播信息为

Attention， please.Northwest Airlines flight NW22 to Tokyo， Honolulu and Los Angeles is now boarding.Passengers in the first class， please proceed to the boarding gate now.此处的广播信息为
A.寻人启事
B.告知乘客办理登记手续
C.告知乘客登机时间已到
D.起飞广播
正确答案：告知乘客登机时间已到