Patrick usually provides child care for six children. Parents leave their children at Patrick's house in the morning and pick them up after work. At the end of each workweek, the parents pay Patrick at an hourly rate for the child care provided that week. The weekly income Patrick receives is usually adequate but not always uniform, particularly in the winter, when children are likely to get sick and be unpredictably absent.Which of the following plans, if put into effect, has the best prospect of making Patrick's weekly income both uniform and adequate?
【选项】Hire a full-time helper and invest in facilities for providing child care to sick children.