What Happens to the Outer Layers of a Low-Mass Star

What happens to the outer layers of a low-mass star after the helium core and shell fusion stages are completed?

A) The star stabilizes at the size of a red giant star, radiation pressure from below balancing gravity from the core, and slowly cools for the rest of its life.
B) The outer layers are spun off into space to make a spiral structure known as a spiral galaxy.
C) The outer layers are propelled slowly away from the core to form a planetary nebula.
D) The star contracts back onto the core and becomes hot enough to undergo further hydrogen fusion, leading to a very hot and active, white dwarf star.