Which of the following hypotheses is best supported by the information above? A. Ergot did not occur in Europe prior to the Middle Ages. B. People in the Middle Ages were well aware of the toxicity of ergot. C. Before the introduction of rye, no attempts had been made to cultivate the poor and damp land in Europe. D. In Europe during the Middle Ages, prosperous people were less at risk from ergot poisoning than poor people were. E. Prior to the Middle Ages, Europe was as densely populated as dependence on a single grain crop permitted.