How are FDDI and FDDI-2 different?

How are FDDI and FDDI-2 different?

A.
FDDI-2 provides higher bandwidth.

B.
FDDI-2 allows for fixed bandwidth to be assigned.

C.
FDDI-2 works over fiber.

D.
FDDI-2 is an actual standard, where FDDI is a de facto standard.

Explanation:
FDDI-2 provides fixed bandwidth that can be allocated for specific
applications. This makes it work more like a broadband connection, which allows for
voice, video, and data to travel over the same lines.