Using the MAC 8c-ec-4b-5b-61-9d, what is a valid EUI-64 link local address?

Using the MAC 8c-ec-4b-5b-61-9d, what is a valid EUI-64 link local address?
A . 2001::a9:8eec:4bff:fc5b:619d
B . fe80::a9:8cec:4bff:fe5b:619d
C . ff80:a9:8eec:4bff:fe5b:619d
D . fe80::a9:8eec:4bff:fe5b:619d

View Answer

Answer: B