The project selection of video surveillance in the park has a simple 30/100 principle, which can be used for project selection quickly. The words 30 and 100 refer to ()

The project selection of video surveillance in the park has a simple 30/100 principle, which can be used for project selection quickly. The words 30 and 100 refer to ()
A . A project with a single access node less than 300,000 investment and a total scale of less than 1 million
B .  A project with a single access node less than 30 channels of 1080P access, with a total scale of less than 100 channels
C .  A project with less than 30 single-node access, with a total size of less than 100 single-node access projects
D .  A project with less than 30 users’ access, with a total scale of less than 100 users

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Answer: B