What Is True About the Hop Limit Field in the IPv6

What is true about the Hop Limit field in the IPv6 header?

A) The field is not changed during the transport of a package.
B) The field is transmitted within a hop-by-hop extension header.
C) Each router forwarding the packet increases the field's value.
D) Each router forwarding the packet decreases the field's value.
E) For multicast packages, the field's value is always 1 . For multicast packages, the field's value is always 1 .