To make up the Avaya Aura® Core, which three links or relationships are the minimum that must be built? (Choose three.)

A. An LDAP link from Avaya Aura® System Manager (SMGR) to the corporate Directory Server
B. A SIP Trunk between Avaya Aura® Communication Manager (CM) and Avaya Aura® System Manager (SMGR)

C. A SIP Trunk between Avaya Aura® Session Manager (SM) and Avaya Aura® Communication Manager (CM)

D. An Avaya Aura® Communication Manager (CM) managed element in Avaya Aura® System Manager (SMGR)

E. A trust relationship between Avaya Aura® System Manager (SMGR) and Avaya Aura® Session Manager (SM)