How is an EUI-64 format interface ID created from a 48-bit MAC address?

A.
by appending OxFF to the MAC address

B.
by prefixing the MAC address with OxFFEE

C.
by prefixing the MAC address with OxFF and appending OxFF to it

D.
by inserting OxFFFE between the upper three bytes and the lower three bytes of the MAC address

E.
by prefixing the MAC address with OxF and inserting OxFafter each of its first three bytes