Answer:
c. file server
Step-by-step explanation:
A file server is a central server of a computer network, which makes a set of files or part of it available to the connected client. In this way, the file server provides users with a centralized storage place for files on their own data carriers, available to all authorized clients. The server administrator establishes strict guidelines to determine which users have access rights and to what data: for example, by configuring the system or granting file system permissions, you can determine which folders a user or group of users can view and open concrete and if the files are only visible or can also be saved, modified or deleted.