A customer has requested that all users should be prevented from dialing international numbers. Which way is the quickest and easiest way to achieve this using Short Codes?

A customer has requested that all users should be prevented from dialing international numbers. Which way is the quickest and easiest way to achieve this using Short Codes?
A . Apply the short code to the ARS table.
B . Apply the short code to a user right.
C . Apply the short code to all external lines.
D . Apply the short code to each user individually.

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Answer: A