What should you create on SERVER1?

You have a DHCP server named SERVER1. SERVER1 has one network adapter.
SERVER1 is located on a subnet named Subnet1.
SERVER1 has scope named Scope1.
Scope1 contains IP addresses for the 192.168.1.0/24network.
Your company is migrating the IP addresses on Subnet1 to use a network ID of 10.10.0.0/16.
On SERVER1 you create a scope named Scope2. Scope2 contains IP addresses for the 10.10.0.0/16 network.
You need to ensure that clients on Subnet1 can receive IP addresses from either scope.
What should you create on SERVER1?

A.
A multicast scope

B.
A scope

C.
A superscope

D.
A split-scope

Explanation:
http://technet.microsoft.com/en-us/library/dd759168.aspx