The IGMP version on the OLT is configured as V2. What kind of processing will the OLT do after receiving the igmr v3 join message forwarded from OnT?

The IGMP version on the OLT is configured as V2. What kind of processing will the OLT do after receiving the igmr v3 join message forwarded from OnT?
A . Normal forwarding
B . Send specific group query message
C . Send general group query message
D . Discard directly

Answer: D