Refer to the exhibit. 

Which ds0-group option should you select to send automated number identification information on outbound calls for this digital T1 voice circuit? 

Answer options:

A. e&m-fgd
B. e&m-fgd
C. fgd-eana
D. e&m-delay-dial
E. fgd-os

C

E&M signaling is often the preferred option for CAS because it avoids glare, it provides answer/disconnect supervision and it can receive Automatic Number Identification (ANI) with FGD and send ANI with FGD-EANA. In other words, you can have 1 channel-group for incoming calls and 1 channel-group for outgoing calls.