单项选择题

A. The route is not announced.
B. The route is announced with community 90:1 added.
C. The route is announced with community 100:1 added.C.The route is announced with community 100:1 added.
D. The route is announced with communities 90:1 and 100:1 added.D.The route is announced with communities 90:1 and 100:1 added.