What is a feature of SIP?

A.
SIP is a transport-layer control protocol that uses IP addresses for transporting multimedia
traffic and call management

B.
SIP is a session-layer control protocol that uses IP addresses for transporting multimedia traffic
and session management.

C.
SIP is an application-layer control protocol that uses SIP addresses for signal and session
management.

D.
SIP is a session-layer control protocol that uses SIP addresses for signal and session
management