The Spartans' Enslaved Population, the Helots, Were

The Spartans' enslaved population, the helots, were:

A) The descendants of people conquered in Sparta's early history and tied to the land in perpetuity.
B) Usually able to buy themselves and their families out of slavery within three generations.
C) Exclusively non-Greeks who aroused little sympathy in other parts of the Greek world.
D) A small minority of the total population of the southern Peloponnesus.