Refer to the exhibit.

What is a method of modifying the External Phone Number Mask on multiple line appearances of
a directory number simultaneously?

A.
Bulk Administration > Phones > Add/Update Lines > Update Lines

B.
Bulk Administration > Users > Line Appearance > Update Line Appearance

C.
Call Routing > Directory Number > Directory Number Configuration > Edit Line Group

D.
Bulk Administration > Phones > Update Phones > Query