Which of the Following Is at the Heart of the Elgin

Which of the following is at the heart of the Elgin Marbles controversy?

A) Greek authorities believe the marbles should be returned to Greece.
B) Pot hunters are seeking the right to maintain ownership over their discoveries.
C) The remains of the Parthenon are in danger of falling into ruin if not properly restored.
D) World leaders are torn over whether the Parthenon should be protected under the auspices of British, Greek, or Turkish authorities.