If the technician has verified that all the phone jacks but one in a home have a dial tone, the next step the technician should take is to check

If the technician has verified that all the phone jacks but one in a home have a dial tone, the next
step the technician should take is to check.

A.
The termination.

B.
For cross talk.

C.
For split pairs.

D.
The polarity.