Archaeologists have researched human bones unearthed from the Andes region between 900 and 2800 years ago. Some chemical isotopes extracted from it reflect that people there mostly ate corn. "Corn culture" drove the Andes The population of the region grew. Several large-scale wars at the time were also related to the scarcity of soil suitable for planting corn. The war led to the continuous transformation and development of the social system. Therefore they concluded that "agriculture promoted the development of the ancient Andean society". Which of the following, if true, would most challenge the above conclusion? ['The Inca civilization of the Andean region experienced several major social changes as early as 2800 years ago.', 'The humans in the Andean region predominantly fished along the coast before 3,600, and gradually migrated inland until about 2800.', 'Other chemical isotopes extracted from human bones reflect that people also consumed potatoes and beans at the time.', 'The social system of the Andean region has a central government and local governments, and then it generates a variety of social forms.']