What is a reason to use DHCPv6 on a network that uses SLAAC?

A.
to get a record of the IPs that are used by the clients

B.
to push DNS and other information to the clients

C.
no reason, because there is no need for DHCPv6 when using SLAAC

D.
because DHCPv6 can be used only in stateful mode with SLAAC to record the IPs of the clients

E.
because DHCPv6 can be used only in stateless mode with SLAAC to record the IPs of the
clients

F.
because DHCPv6 is required to use first-hop security features on the switches