What is the expected outcome when an EUI-64 address is generated?

What is the expected outcome when an EUI-64 address is generated?

A. The interface ID is configured as a random 64-bit value B. The characters FE80 are inserted at the beginning of the MAC address of the interface C. The seventh bit of the original MAC address of the interface is inverted D. The MAC address of the interface is used as the interface ID without modification