A user reports poor quality on voice calls and is instructed to select the QRT softkey. How can you access the information generated by this call?

A.
Use Tools\QRT Viewer under the Cisco CallManager Serviceability page

B.
Use the perfmon counter application under Administrative Tools

C.
Use the System\Real-time Monitor Tool under Cisco CallManager Administration

D.
Use the QRT plug-in on the PC of an administrator