About multi-node centralized network, which of the following statement is correct?

About multi-node centralized network, which of the following statement is correct?
A . U1981 cannot be used as a branch node
B . All types of local node’s users are synchronized from the central node
C . You can view the license information of central node and local node on the central node
D . The number of users registered on one local node of the central node cannot be larger than the local node’s license number

Answer: D