Prior to the 1990s,most Astronomers Assumed That Gamma-Ray Bursts Came

Prior to the 1990s,most astronomers assumed that gamma-ray bursts came from neutron stars with accretion disks.How do we now know that this hypothesis was wrong?

A) We now know that gamma-ray bursts come not from neutron stars but from black holes.
B) Theoretical work has proven that gamma rays cannot be produced in accretion disks.
C) Observations from the Compton Gamma-Ray Observatory show that gamma-ray bursts come randomly from all directions in the sky.
D) Observations from the Compton Gamma-Ray Observatory show that gamma-ray bursts occur too frequently to be attributed to neutron stars.
E) Observations from the Compton Gamma-Ray Observatory have allowed us to trace gamma-ray bursts to pulsating variable stars in distant galaxies.