Which of the following reasons best explains why some areas on the map show at least 50 percent of the labor force is engaged in agriculture? A. These are developed regions with commercial agriculture and agribusiness to support large populations.

B. These are regions with a heavily vegetarian diet that requires more farming to supply sufficient nutrients.

C. These are regions in which intensive subsistence agriculture is still the norm.

D. These are regions in which dairying is the primary type of agriculture, requiring intensive year-round labor.

E. These are regions that have suffered drought, with massive efforts underway to replenish soil nutrients.