The company has a small network. The network consists of one switch and one router. The switch has been configured with two VLANs. The router has been configured as a router-on-a-stick to allow inter-VLAN routing. A trunk is configured to connect the switch to the router. What is the minimum number of router subinterfaces that are required for all the VLANs to communicate?

A.	zero
B.	one
C.	two
D.	three