Which of the following best describes an autonomous system?

A.
An autonomous system is a loosely defined term that can refer to any organization that
has a connection to the Internet.

B.
An autonomous system is a network or group of networks from many organizations
running different IGP routing protocols, but all running BGP.

C.
An autonomous system is a network or group of networks operating under one
administrative authority.

D.
An autonomous system is another term for the collection of routers that make up the
Internet