Which user role should you assign to User1?

You have a server named Server1.
You install the IP Address Management (IPAM) Server feature on Server1.
You need to provide a user named User1 with the ability to set the access scope of all the DHCP servers that
are managed by IPAM. The solution must use the principle of least privilege.
Which user role should you assign to User1?

A.
IP Address Record Administrator Role

B.
IPAM Administrator Role

C.
IPAM ASM Administrator Role

D.
IPAM DHCP Administrator Role

Explanation:
https://technet.microsoft.com/en-us/library/dn268500(v=ws.11).aspx