Refer to the following exhibit.
Choose the best answer that describes the multicast LAN.
A . There are no active sources in the network
B . There is one active source for 239.1.1.1 and two active sources for 239.2.2.2
C . The devices on sap 1/1/4 and sdp 1000:500 have issued joins for 239.1.1.1
D . There is a router on sdp 1000:500
Answer: D