They were used to challenges. It had taken them many months to make the terrible trip. Many had died of illness on the way; then many died of hardship during the winter. The supplies they had brought in their wagons were so nearly gone that, by spring, they were living partly on roots, dug from the ground. All their lives now depended on the crops they could raise in the valley. They made the barren land fertile bringing mud from the river to the dry land, and creating irrigation channels. They planted corn and grain and vegetables, and everyone collaborated. Then it was an anxious time as they watched for the plants to grow, with hopes, and prayers, and careful eyes.

What is the main idea of the second passage?

a. They had a challenging trip.
b. They were glad to live near the lake.
c. They needed food.
d. They were farmers.