You work as an administrator at Contoso.com. The Contoso.com network consists of a single domain named Contoso.com. All servers on the Contoso.com network have Windows Server 2012 R2 installed.
Contoso.com has a server, named ENSUREPASS-SR07, which has the ADDS, DHCP, and DNS server roles installed. Contoso.com also has a server, named ENSUREPASSSR08, which has the DHCP, and Remote Access server roles installed. You have configured a server, which has the File and Storage Services server role installed, to automatically acquire an IP address. The server is named ENSUREPASSSR09.
You then create reservation on ENSUREPASS-SR07, and a filter on ENSUREPASSSR08.
Which of the following is a reason for this configuration?（）

A. It allows ENSUREPASS-SR09 to acquire a constant IP address from ENSUREPASSSR08 only.
B. It configures ENSUREPASS-SR09 with a static IP address.
C. It allows ENSUREPASS-SR09 to acquire a constant IP address from ENSUREPASSSR07 and ENSUREPASSSR08.
D. It allows ENSUREPASS-SR09 to acquire a constant IP address from ENSUREPASSSR07 only.