The Helix and Egg Nebulae Which Originated from (What Are

Multiple Choice

The Helix and Egg nebulae which originated from (what are today) white dwarf stars are

A) supernova remnants.
B) planetary nebulae.
C) the result of uranium detonation.
D) the result of the collapse of the iron core of each star.
E) nebulae associated with protostars.