TOEFL Reading: ETS-TOEFL阅读机经 - 3NEC3IB8_157371_L$

In paragraph 2, why does the author mention the potato blight that occurred in Ireland? A. To identify a crop that was more successful in the United State than it was in Western Europe B. To support a claim about regional agricultural failures C. To give an example of a problematic trend that had started in the late seventeenth century D. To provide evidence that many countries in Europe experienced a loss of population in the nineteenth century