In an MCU call with three Cisco TelePresence MX800 systems and a mobile phone calling in, the three TelePresence MX800 systems suddenly experience low audio levels, but the mobile phone audio levels are correct. What can you do to correct this issue?

A.	Turn off the audio processors on the TelePresence MX800.
B.	Use the mobile phone audio option on the TelePresence MX800 to adjust the mobile phone levels.
C.	Mobile phone audio levels can vary, so you cannot correct the issue.
D.	Turn on AGC on the MCU to adjust the audio levels.
E.	Turn on ALG on the MCU to adjust the audio levels.
F.	Turn on the Auto Adjust levels under “Settings > Audio” on the MCU.