Answer:
The correct answer would be B, Set of Rules.
Step-by-step explanation:
In simple words, a Protocol can be defined as a set of Rules.
In computer networking terms, a protocol is a set of predefined rules and regulations, procedures and formats, which govern the communication between the different devices over a network. Protocols ensure the timely and secure communication between devices.
There are many different types of protocols. Some of the common protocols are FTP, HTTP, USENET, etc. Each of them has their own set of procedures and formats.