Which solution supports these requirements?

An organization plans to deploy multicast across two different autonomous systems.

Their solution must allow RPs to:

• discover active sources outside their domain

• use the underlying routing information for connectivity with other RPs

• announce sources joining the group

Which solution supports these requirements?
A . MSDP
B . SSM
C . PIM-SM
D . PIM-DM

Answer: A

Explanation:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/xe-3s/asr903/imc-pim-xe-3s-asr903-book/imc_msdp.pdf