What Is the Eventual Fate of a Brown Dwarf

Multiple Choice

What is the eventual fate of a brown dwarf?

A) It remains the same forever.
B) It gradually cools down and becomes ever dimmer.
C) It gradually contracts and heats up until nuclear fusion ignites in its interior and it becomes a faint star.
D) It becomes ever denser and hotter until it becomes a white dwarf.
E) Gravity ultimately "wins" and it becomes a small black hole.