How is an EUI-64 format interface ID created from a 48-bit MAC address?
A. by prefixing the MAC address with 0xFF and appending 0xFF to it
B. by appending 0xFF to the MAC address
C. by inserting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
D. by prefixing the MAC address with 0xFFEE
Answer: C