The incorrect answer is A. Slaves called helots did all the hard work and were brutally treated.
The cities of Athens and Sparta were major rivals in ancient Greece. even though they were close to each other geographically, they had a very different lifestyle and culture. Helots were a subjugated group of people in Laconia and Messenia, a teritory controlled by Sparta. They occupied a status that was neither free men, nor slaves, according to famous historians. Their main occupation was agriculture.