The correct answer is A) Spartans had their own communities and Athenians did not.
The helots formed the population of Laconia and Messenia, towns that were controlled by Sparta. They were tied to the land and primarily worked in agriculture as the majority and economically supported the Spartan citizens. They are considered in a cathegory between free men and slaves.
In Athens the slaves had less liberty, they could live with or without their owners and worked in many types of activities. But they did not have a special place to live as helots did, and they were considered slaves and were not paid for their work.