What are the ways the RID can be created on an Nokia 7750 SR router? (Choose three)

What are the ways the RID can be created on an Nokia 7750 SR router? (Choose three)
A . From the last 32 bits of the chassis MAC address
B . From the first 32 bits of the chassis MAC address
C . The loopback IP address
D . By using the command "config router ospf rid
G . X"
H . From the system IP address
. From the highest interface IP address

Answer: A,D,E