You have an Exchange Server 2013 organization. A user named User1 has a mailbox that is enabled for Unified Messaging (U

[answerhappygod]

You have an Exchange Server 2013 organization.
A user named User1 has a mailbox that is enabled for Unified Messaging (UM). User1 has nine call answering rules.
When User1 attempts to create a new call answering rule, the user receives an error message.
You need to identify what prevents User1 from creating a call answering rule.
What should you identify?

A. The mailbox of User1 has the CallAnsweringRulesEnabled parameter set to $false
B. The UM mailbox policy of User1 has the AllowCallAnsweringRules parameter set to $false.
C. User1 exceeds the Inbox rules storage quota.
D. User1 has the maximum number of call answering rules allowed.