Which three options are valid ways to filter routes from a BGP peer？（）

A.configuring EIGRP stubs
B.configuring a second EIGRP AS and redistributing
C.configuring summary addresses
D.configuring an offset-list
E.configuring a prefix-list
F.configuring unicast neighbors

A.It will fragment the packet at Layer 2.
B.It will fragment the packet at Layer 3.
C.It will drop the packet and send an ICMPv6 message "packet too big" back to the source.
D.It will drop the packet.

A.ldp explicit-null
B.mpls forwarding explicit-null
C.mpls ldp advertise-labels explicit null
D.mpls ldp explicit-null