Which feature constrains IPv6 traffic at Layer 2 by configuring Layer 2 ports dynamically to forward IPv6 multicast traffic only to those ports that want to receive it?

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IPv6 multicast is enabled in a VPLS domain. An operations engineer must reduce the multicast flooding in this VPLS domain.

Which feature constrains IPv6 traffic at Layer 2 by configuring Layer 2 ports dynamically to forward IPv6 multicast traffic only to those ports that want to receive it?
A . IGMP snooping
B . MLD snooping
C . MLD querier
D . IGMP version 3
E . MLD version 2

Answer: B