Two routers that are running MPLS and LDP have multiple links that than connect them to each other. An engineer wants to ensure that the label bindings are not flushed from the LIB if one of the links fails. Which configuration meets this requirement? 

Answer options:

A. thempls ldpautoconfigcommand
B. thempls ipcommand on an MPLS TE tunnel
C. thempls ldp synccommand under router process configuration mode
D. thempls ldp discoverytargeted-hello accept command

D