Medieval History -In the Middle Ages, What Did It Mean to Be

Medieval History
-In the Middle Ages, what did it mean to be the Holy Roman Emperor?

A) The Holy Roman Emperor was the senior monarch among the Catholic monarchs.
B) The Holy Roman Emperor was the head of the city of Rome.
C) The Holy Roman Emperor was the head of Byzantium.
D) It was a purely honorary title that involved no special role or power.
E) The Holy Roman Emperor was the head of the Roman Empire.