Astronomers Now Have a Good Idea for Explaining How the Short-Duration

Astronomers now have a good idea for explaining how the short-duration gamma-ray bursts might come about. Which of the following is part of their explanation?

A) these bursts come from the clouds of comets that surrounds our solar system
B) these bursts most likely come from the merger of two neutron stars
C) these bursts involve a supernova explosion of a star that has lost its outer layer of hydrogen
D) these bursts should easily be observed to have "afterglows" in other wavelengths besides gamma-rays
E) these bursts are very common; most of the gamma-ray bursts are short-duration