Features of modern agriculture in the 20th Century include (check all that apply): Group of answer choices A reliance on mechanization using fossil-fuel driven tractors. Production for global markets in crops like rice, wheat, or sugar. Shrinking of rural populations especially in the most 'developed' areas of modern agriculture such as Europe or the United States. A proliferation of new varieties of rare specialty crops highly adapted to traditional management techniques by poorer smallholder farmers without fertilizer