TOEFL Reading: ETS-TOEFL阅读机经 - N8FQU7332KX6YDO7L$

According to paragraph 1, all of the following contributed to the widespread adoption of the potato in Europe EXCEPT: A. Peasants growing potatoes for their own use could support themselves on smaller plots of land. B. Potatoes grew well in a variety of locations in Europe. C. Potatoes were the preferred food of European military forces. D. Agricultural publicists encouraged the public to eat potatoes.