Which two statements describe source trees in a multicast environment? (Choose two.)

Which two statements describe source trees in a multicast environment? (Choose two.)
A . Source trees guarantee the minimum amount of network latency for forwarding multicast traffic
B . Source trees create an optimal path between the source and the receivers
C . Source trees use a single common root placed at some chosen point in the network
D . Source trees can introduce latency in packet delivery
E . Source trees can create suboptimal paths between the source and the receivers

Answer: A,B