Which two reasons explain why the last policy ID value is 0?

While testing outbound MTA functionality, an administrator discovers that all outbound email is being processed using policy IDs 1:2:0.

Which two reasons explain why the last policy ID value is 0? (Choose two.)
A . Outbound email is being rejected
B. IP policy ID 2 has the exclusive flag set
C. There are no outgoing recipient policies configured
D. There are no access delivery rules configured for outbound email

Answer: C,D