单项选择题

A. R1's solicited node multicast address is FF02::1:FF:12:3456.
B. R1's 2000::4:213:19FF:FE12:3456 address is a global unicast with all 128 bits statically configured.
C. Address FF02::2 is  R1's solicited node multicast.
D. R1's solicited node multicast, not listed in this output, would be FF02::213:19FF:FE12:3456.