Which of the following descriptions of MUX vlan characteristics is correct?

Which of the following descriptions of MUX vlan characteristics is correct?
A . There are two types of ports: uplink port and service virtual port
B . A MUX VLAN can contain multiple uplink ports and multiple service virtual ports
C . Layer 2 interworking between different MUX VLANs
D . MUX VLAN is mainly used for community access.

Answer: A