Given the following line from a name service configuration file:

ethers: nis [UNAVAIL=return] files

Which two statements correctly describe the behavior of the name service switch? (Choose two.)

A.
If the NIS server does NOT respond, the search for the ethers entry will end without looking in the local file.

B.
If the NIS server does NOT respond, the search for the ethers entry will continue by looking for it in the local file.

C.
If NIS does respond, but does NOT find the appropriate entry in its ethers map, the search will end without looking in the local file.

D.
If NIS does respond, but does NOT find the appropriate entry in its ethers map, the search will continue by looking for it in the local file.