SMC 2.0 + VP9650 MCU + TE50 terminal networking, manually configure the protocol and format of the conference template to H.264 720P 30F, but after convening the conference, it is found that all the conference sites have the protocol and format of H.264 4CIF. Is ().

SMC 2.0 + VP9650 MCU + TE50 terminal networking, manually configure the protocol and format of the conference template to H.264 720P 30F, but after convening the conference, it is found that all the conference sites have the protocol and format of H.264 4CIF. Is ().
A . The ability of the main venue is set incorrectly, check whether the ability of the main venue reaches
B . 264 720P
C . VP9650 MCU port configuration error is caused, check the VP9650 MCU port configuration
D . SMC 2.0 did not import the license. Re-import a valid license.
E . The account for scheduling conferences is not authorized enough. Use the admin account to log in and reschedule.

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Answer: B