TOEFL Reading: ETS-TOEFL阅读机经 - 41N963HQPSI31PY6L$

Paragraph 1 implies which of the following about agriculture before the introduction of the new plow? A. Limited rainfall had prevented large-scale agricultural development. B. Most of Europe's developed agricultural communities were located in the south. C. Several other important innovations immediately preceded the development of the new plow. D. Much of Europe's forestland had been converted to agricultural use.