Are Crystalline Stars or Crystalline Remnants of Stars Possible? Why

Are crystalline stars or crystalline remnants of stars possible? Why or why not?

A) No. Stars and stellar remnants are too hot to crystallize.
B) Yes. They are the likely outcome of the cooling of a white dwarf.
C) No. The forces needed to crystallize a star would actually cause the star to collapse gravitationally into a black hole.
D) Yes. They are the likely outcome of the creation of iron in the core of a massive star.