单项选择题

A. Router R1 will deny the 172.16.1.0/26 route while permitting the 172.16.1.64/27 route to be advertised.
B. Router R1 will advertise both rou tes.
C. Router R1 should be reconfigured with an ACL instead of an ip prefix - list command.
D. Router R1 will deny the 172.16.1.0/27 route while permitting the 172.16.1.0/26 route to be advertised.