A diagram with 3 routers: HQ2 ?HQ1 ?BR1. + HQ2 (with IP IPV6 and Loopback 1.1.1.1)
+ HQ1 (with IP IPv6 and Loopback 2.2.2.2)
+ BR1 (with IP IPv6 and Loopback 3.3.3.3)
Running with EIGRP 100 on both routers and what command you will implement so that you will see the loopback IP of BR1 to be advertised at HQ2
A. HQ2(config)# ipv6 router eigrp 100
HQ2(config-rtr)# no eigrp stub
B. BR1(config)#ipv6 router eigrp 100
BR1(config-rtr)# no eigrp stub receive-only
C. HQ2(config)# ipv6 router eigrp 100
HQ2(config-rtr)# no eigrp stub only
D. BR1(config)# ipv6 router eigrp 100
BR1(config-rtr)# no eigrp stub only
Question is incomplete, but may be B.