Which three conditions can make a transit autonomous system unable to forward packets from one neighboring autonomous system to another neighboring autonomous system? (Choose three.)

A.
sync enabled

B.
bgp next-hop not reachable

C.
no full-mesh IBGP and not using route reflectors or confederations

D.
non-directly connected IBGP neighbors

E.
non-directly connected EBGP neighbors

F.
EBGP to IBGP route redistribution configuration errors