What is the purpose of implementing feature access codes?

A.
to allow an end user to be able to dial a set of digits to associate a call with a billing pattern

B.
to allow the end user to gain access to premium telephone numbers from any phone in the
organization

C.
to allow analog phones to be able to invoke the same types of features available on IP phone
soft keys

D.
to allow an administrator to create customer codes for call billing