【单选题】Leaving aside the question of how black holes generate the energy in gamma-ray bursts-cosmic explosions called GRBs-their sheer brilliance has posed a dilemma. So much radiation emanates from the GRB'...
A.
Though the forces which influence GRBs are now established, scientists have yet to establish their cause.
B.
Scientists have now established the role that kinetic energy plays in the existence of GRBs.
C.
Certain aspects of GRBs have finally allowed scientists to link them to specific kinds of collapsed stars.
D.
Though still perplexed by the cause of GRBs, scientists have discovered how they manage to escape the gravity of black holes.
E.
Fireballs can transform. explosive energy into observed radiation, as had long been hypothesized.