When the Core of a Massive Star Collapses,a Neutron Star

Multiple Choice

When the core of a massive star collapses,a neutron star forms because

A) all the charged particles are ejected in the resulting explosion.
B) protons and electrons combine to minimize electromagnetic forces.
C) iron nuclei disintegrate into neutrons.
D) neutrinos escaping from the core carry away most of the electromagnetic charge.