Which two statements about mapping multicast IP addresses to MAC addresses are true? (Choose two.)

Which two statements about mapping multicast IP addresses to MAC addresses are true? (Choose two.)
A . All mapped multicast MAC addresses begin with 0x0100.5E
B . The router performs the mapping before it hands the packet off to a switch
C . All multicast MAC addresses end with 0x0100.5E
D . The mapping process may generate overlapping addresses, which can cause receivers to receive unwanted packets
E . All destination MAC addresses begin with an octet of binary 1s

Answer: A,D