The HILED large screen interacts with Huawei terminals through the () protocol and is controlled through the Huawei Tuch that comes with the terminal. Including: sleep/wake up, brightness adjustment, volume adjustment (including mute, volume size), etc.

The HILED large screen interacts with Huawei terminals through the () protocol and is controlled through the Huawei Tuch that comes with the terminal. Including: sleep/wake up, brightness adjustment, volume adjustment (including mute, volume size), etc.
A . Data
B . SIP
C . USB
D . HDMI CEC

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Answer: D