The Nobel Prize in Physics 2020 has been awarded “for the discovery of ______”?

A. Black hole formation is a robust prediction of the general theory of relativity
B. Of a supermassive compact object at the centre of our galaxy
C. Both A & B
D. None of these

The Nobel Prize in Physics 2020 was divided, one half awarded to Roger Penrose “for the discovery that black hole formation is a robust prediction of the general theory of relativity”, the other half jointly to Reinhard Genzel and Andrea Ghez “for the discovery of a supermassive compact object at the centre of our galaxy.