The rent would take 88 percent of Arleen’s $628-a-month welfare check. Maybe she could make it work. Maybe they could at least stay through winter, until crocuses and tulips stabbed through the thawed ground of spring, Arleen’s favorite season. There was a knock at the door. It was the landlord, Sherrena Tarver. Sherrena, a black woman with bobbed hair and fresh nails, was loaded down with groceries. She had spent $40 of her own money and picked up the rest at a food pantry.