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
