Which of the following, if true, would best undermine the theory the author of the passage provides for the sudden disappearance of the Olmec? A. Much of the flooding that resulted came not from any diverted tributaries but by rainfall that intensified over the course of a decade. B. Not all the major subsistence crops were planted along the Coatzacoalcos River. C. Internal dissent was long offered as a theory for the disappearance of the Mayans, but in recent years there is near unanimous agreement that the disappearance was mostly caused by meteorological phenomenon. D. The Olmec split into two groups that warred persistently for several decades before both succumbed to meteorological changes that made settlement of the area virtually impossible. E. The Olmec leadership successfully relocated settlements near one of the new tributaries of Coatzacoalcos, yet years of constant flooding precluded the growth of subsistence crops.