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

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.

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Answer: D