Which statement about the NPTv6 protocol is true?

A.	It is used to translate IPv4 prefixes to IPv6 prefixes.
B.	It is used to translate an IPv6 address prefix to another IPv6 prefix.
C.	It is used to translate IPv6 prefixes to IPv4 subnets with appropriate masks.
D.	It is used to translate IPv4 addresses to IPv6 link-local addresses.