You need to configure the virtual networks

A company plans to increase its virtual network capacity by adding virtual network subscriptions.
You must increase the number of subscriptions from 3 to 15.
You need to configure the virtual networks.
What should you do?

A.
Export and modify the network configuration file. Then import the modified file.

B.
Export and modify the service definition file. Then import the modified file.

C.
Create and import a new network configuration file.

D.
Create a multi site virtual network.