The VPN configuration on a certain device is as follows, which of the following description about the configuration command is correct?

The VPN configuration on a certain device is as follows, which of the following description about the configuration command is correct?
A . This command is configured on the CE device of the customer network.
B . Route-Distinguisher 1:1 indicates that the value of RD is 1:1, and RD does not have to be globally unique
C . vpn-target 1:1 exportcommunity indicates that the export target of the VPN is 1:1
D . vpn-target 2:2 importcommunity indicates that the import target of VPN is 2:2, and only one import target can be set.

Answer: C