RSE6500 supports synchronous recording of three screens and telepresence for synchronous playback. The correct description of its implementation principle is () (single choice)
A . The three-screen telepresence synthesizes a three-screen by itself, and then sends RSE to record
B . Three-screen telepresence directly sends three streams to RSE for recording
C . With the help of MCU, the three-screen telepresence is combined into a three-screen, and then sent to RSE for recording
D . With the help of an analog video synthesizer, the three-screen telepresence is combined into a three-screen, and then sent to RSE for recording
Answer: C