In a network, the computer that stores the files and process the data is named as

The correct answer is A. Server.

A server is a computer that provides services to other computers on a network. Servers can be used to store files, process data, and run applications.

A terminal is a computer that is used to interact with a server. Terminals are typically used to enter commands and view data.

A modem is a device that converts digital signals to analog signals and vice versa. Modems are used to connect computers to the internet.

The answer is not B, C, or D because these are not computers that store files and process data.