In the byzantine empire who have the final say on church matters

If I am correct, the Byantine Emperrors had the final say on matters within the Catholic Church.

can you attach the answer options

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.