Which two statements about MLD snooping are true? (Choose two)

Which two statements about MLD snooping are true? (Choose two)
A . When MLD snooping is enabled, QoS is automatically enabled.
B . A VLAN can support multiple active MLD snooping queries, as long as each one is associated to a different multicast group.
C . AN MLD snooping querier election occurs when any MLD snooping querier goes down or if there is an IP address change on the active querier.
D . When multiple MLD snooping queriers are enabled in a VLAN, the querier with the lowest IP address in the VLAN is elected as the active MLD snooping querier.

Answer: C,D