A company has a Skype for Business Server 2015 environment. All users are enabled for Enterprise Voice. The infrastructure has a single route that applies to all users of (.*). You need to prevent the users from calling external numbers that start with 1900 or 1976.
What are two possible ways to achieve this goal? Each correct answer presents a complete solution.
A . Create an unassigned number range of +19000000000to +19009999999and +19760000000to +19769999999.
B . Modify the dial plan rules to exclude the normalization of dialed numbers that start with 1900 or 1976.
C . Create a voice route that has the following match pattern: ^+(!(1900 | 1976))
D . Create a voice route that has the following match pattern: ^+(?!(1900 | 1976))
Answer: AD