Which clients receive the multicasts?

Refer to the exhibits.

Exhibit 1

Exhibit 2

Exhibit 2 shows IGMP groups on Switch-2, which runs IGMP but not PIM. Switch-1 and Switch-3 do not have IGMP or PIM enabled. Client 1 begins to forward multicasts to 239.1.1.1.

Which clients receive the multicasts?
A . Client 3, but not any of the other clients
B . Client 2, but not any of the other clients
C . Client 3 and Client 4, but not Client 2
D . Client 2, Client 3, and Client 4

Answer: B