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 +19000000000 to +19009999999 and +19760000000 to +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))
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