In a stateless IPv6 auto-configuration scenario, what is the host’s IPv6 address if the interface’s MAC address is 12:34:ab:cd:ef:56?

In a stateless IPv6 auto-configuration scenario, what is the host’s IPv6 address if the interface’s MAC address is 12:34:ab:cd:ef:56?
A . fe80::1234:abff:fecd:ef56/64
B . fe8::1234:abff:fecd:ef56/64
C . fec0::1234:abff:fecd:ef56/64
D . fe80::1234:abcd:ef56/64

Answer: D