After the Core of a Massive Star Becomes a Neutron

After the core of a massive star becomes a neutron star, the rest of the star's material

A) falls inward very slowly, taking billions of years to get really compressed
B) makes a planetary nebula, which gently moves outward from the center
C) is vaporized by the incredible heat of the dying star and evaporates
D) explodes outward as a supernova
E) continues regular fusion and returns to the main sequence