Which two items are needed to support DNS sticky in a mesh environment? (Choose two

Which two items are needed to support DNS sticky in a mesh environment? (Choose two.)

A.
system clock synchronization using NTP on all Cisco GSSs in the mesh

B.
same global subnet mask values on each Cisco GSS in the peer mesh

C.
DRP on local routers

D.
same global subnet mask values on directly-attached Cisco GSSs