Which of the following represents a difference between Spartan helots and Athenian slaves?
A: Spartan helots had their own communities, but Athenian slaves did not.
B: Spartan helots had their freedom, but Athenian slaves did not.
C: Spartan helots were viewed as private property, but Athenian slaves were not.
D: Spartan helots were laborers, but Athenian slaves were not.