单选题Which IGMPv2 message contains a non-zero "Max Response Time"？（）AMembership QueryBMembership ReportCMembership DelayDBackward Compatible IGMPv1 Report Message
单选题
Which IGMPv2 message contains a non-zero "Max Response Time"？（）
A
Membership Query
B
Membership Report
C
Membership Delay
D
Backward Compatible IGMPv1 Report Message
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