Policy -Based Routing (PBR) has been enabled on Router R1's interfa ce F0/0. Which of the following is true regarding how PBR works?（）

A、Packets entering F0/0 will be compared based on the PBR route map.

B、Packets exiting F0/0 will be compared based on the PBR route map.

C、IOS ignores the PBR forwarding directions wh en the packet matches a route map deny clause.

D、IOS ignores the PBR forwarding directions when the packet matches a route map permit clause.