which line CSS, would prevent access to toll free numbers?

If a phone has a device CSS that permits access to all internal and external numbers, which line
CSS, would prevent access to toll free numbers?

If a phone has a device CSS that permits access to all internal and external numbers, which line
CSS, would prevent access to toll free numbers?

A.
block local, block international

B.
block local, toll free and block international

C.
block toll free

D.
block local, block long distance, block toll free

Explanation:
Explanation : block local will block every call



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