You need to ensure that only Scope1, Scope3, and Scope5 assign the same DNS servers to DHCP clients

Your network contains an Active Directory domain named contoso.com.
The domain contains a server named Server3 that runs Windows Server 2012 R2 and has the
DHCP Server server role installed.
DHCP is configured as shown in the exhibit.

Scope1, Scope2, and Scope3 are configured to assign the IP addresses of two DNS servers to
DHCP clients. The remaining scopes are NOT configured to assign IP addresses of DNS servers
to DHCP clients.
You need to ensure that only Scope1, Scope3, and Scope5 assign the same DNS servers to DHCP
clients. The solution must minimize administrative effort.
What should you do?

A.
Create a superscope and scope-level policies.

B.
Configure the Scope Options.

C.
Create a superscope and a filter.

D.
Configure the Server Options.

Explanation:
Any DHCP scope options configured for assignment to DHCP clients

http://technet.microsoft.com/en-us/library/dd759218.aspx
http://technet.microsoft.com/en-us/library/cc757682(v=WS.10).aspx