Answer:
A- Application Service Provider
Explanation:
An application service provider (ASP) is someone that render computer service to his/ her customers or clients over a network by delivering software applications.
It also give access to an application, by charging a usage or subscription fee over the internet.
Bob Kahn and Vint Cerf were both pioneers of the Internet, and Tim Berners-Lee was known for inventing the WWW.
The answer would be A.
The rest seem impractical.