A "Cradle to grave" ("beginning to end") call control is a functionality of which of the following? (Choose 2 answers).

A "Cradle to grave" ("beginning to end") call control is a functionality of which of the following? (Choose 2 answers).
A . Registrar
B . Stateless Proxy
C . Stateful Proxy
D . B2BUA
E . Redirect Server

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Answer: A,D