Final answer:
The address 2001:0DB8::/32 is the IPv6 global unicast address among the options provided. Global unicast addresses are intended to be unique and routable across the entire internet.
Step-by-step explanation:
The IPv6 address that represents a global unicast address among the given options is d) 2001:0DB8::/32. The address prefixes assigned to the types of IPv6 addresses help determine their scope and usage. For instance, the prefix FE80::/10 is reserved for link-local unicast addresses, which are not routable beyond a single network segment. The prefix FD00::/8 is for unique local addresses (ULAs), which are intended for local communications within a site and are not supposed to be routable on the global internet. Addresses with the prefix FF00::/8 are multicast addresses, used to send a single packet to multiple destinations. Finally, the 2001:0DB8::/32 address is a global unicast address designed to be globally unique and routable on the internet, often used for documentation purposes.