Which two descriptions are correct about characteristics of IPv6 unicast addressing?

Which two descriptions are correct about characteristics of IPv6 unicast addressing? (Choose two)

A.
Global addresses start with 2000::/3.

B.
Link-local addresses start with FF00::/10.

C.
Link-local addresses start with FE00:/12.

D.
There is only one loopback address and it is ::1.