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题目材料：
Over the last 20 years, both the total amount of grain produced in Andesara and the total amount of grain consumed by the Andesaran population have increased. Over the same period, however, although the amount of grain produced has increased more than the total amount of grain consumed by Andesara's inhabitants has increased, Andesara has gone from exporting more grain than it imports to importing more grain than it exports.
In light of the information given, which of the following, if true, most helps to account for Andesara's now importing more grain than it exports?
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A.The population of Andesara is substantially larger today than it Was twenty years ago.
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B.The proportion of Andesara's annual grain production that is exported to neighboring countries is substantially smaller today than it was twenty years ago.
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C.The proportion of Andesara's annual grain production that is fed to cattle is substantially greater today than it was twenty years ago.
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D.The proportion of Andesarans for whom grain is a major component of their diet is substantially smaller today than it was twenty years ago.
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E.In some countries to which Andesara once exported grain, agricultural advances during the last twenty years have led to dramatic increases in food production.
C显示答案
