Which two statements are true about a call from AST 1011111 to AST 1011112?

Refer to the Exhibit.

Which two statements are true about a call from AST 1011111 to AST 1011112? (Choose two.)
A . In step 3, Avaya Aura® Communication Manager (CM) sends SIP Options to 1011112 looking for a 200 ok response to check it is reachable.
B . In step 2, Avaya Aura® Session Manager (SM) matches 1011111 with a Communication Profile, and uses the defined Originating Application Sequence to route the call to Avaya Aura ® Communication Manager.
C . In step 1, when 1011111 draws dial tone it sends an Invite to Avaya Aura® Session Manager (SM) with the Request URI containing 1011111.
D . In step 2, the Avaya Aura® Session Manager (SM) uses a dial pattern and routing policy to route the call to Avaya Aura® Communication Manager (CM).

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Answer: B,C