Answer:
c. The share to the file server is disconnected.
Step-by-step explanation:
A file server is responsible for storing and retrieving of files used by all other computers that are connected to it via a network. The file sharing protocol that are commonly use to access file servers on a local area network(LAN) could be Server Message Block or Common Internet File System.
The messages implies that the network access protocol to the file server has been disconnected, hence the reason the file server could not be accessed.