What is the term used to identify networks that present a clearly defined external routing policy to the Internet

Answer options:

A.Autonomous System numbers
B.Internet System numbers
C.Autonomous System locators
D.Internet System locators

Answer - A
Autonomous System numbers are used to identify networks that present a clearly defined external routing policy to the Internet. AWS Direct Connect requires an ASN to create a public or private virtual interface. You may use a public ASN which you own, or you can pick any private ASN number between 64512 to 65535 range.
For more information on Autonomous System numbers, one can visit the below URL:
https://en.wikipedia.org/wiki/Autonomous_system_(Internet)