With modem audio -recording equipment, there is (are) ______.

A．no difficulty in recording speakers in many face -to-- face situations or on the telephone
B．still some difficulties in recording speakers in many face -to -face situations or on the telephone
C．no difficulty in recording speakers in many face - to - face situatious but some on the telephone
D．some difficulties in recording speakers in many face - to - face situations but not an the telephone