[When an IP packet arrives at a router,generally the router looks at the destinationaddress of the packet,and forwards the packet to one of its network interfaces.Theforwarding decision is usually done by looking up the destination address from anotherdata structure called a forwarding tablE.The forwarding table is created by the routerusing the routing table and possible routing policies existing in the router.The routerthen creates a table where it lists which networks are accessible through which of therouter's network interfaces.An IP router looks at every IP packet individually and doesthe forwarding decision on a packet-by-packet basis.If something changes in the router'srouting table,a packet can take a different route from a preceding packet even if ithas the same destination.]
From the paragraph above,we can see that the router（1）a forwarding table accordingto the routing table and possible routing policies existing in the router.When an IPpacket arrives at a router,the（2）part of packet is normally checked by the router.AnIP router checks every IP packet individually and makes the forwarding decision basedon（3）._____.

A.forwarding table

B.network interfaces

C.routing policies

D.destination address