Economists have frequently hypothesized that industrialization and its correlates played a major role in inducing fertility decline in the United States after 1850. ... This leaves changes in the cost of raising children as the likely driver of the industrialization result.
I believe the answer is D. WWI was the first "total war," in which all of the people in all of the involved countries participated and were impacted.
Well, if we are talking about the black death? A reaction that they did was they all went into hiding because they thought that the black death was an angel or something targeting certain families, they were right it was something but it was just a virus that almost killed an entire country!!
A
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