Daniel Defoe's A Journal of the Plague Year is a first-person, mostly nonlinear narrative told by protagonist H.F., an unmarried saddler whose name is only revealed by his signature at the end of the work. The Journal is a tale of his experiences during the plague that afflicted London in 1665; the work is thus fiction but is peppered with statistics, data, charts, and government documents. H.F. begins by relating rumors that the plague had come to Holland, and closely follows the bills of mortality.
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Sphere of influence, in international politics, the claim by a state to exclusive or predominant control over a foreign area or territory. The term may refer to a political claim to exclusive control, which other nations may or may not recognize as a matter of fact, or it may refer to a legal agreement by which another state or states pledge themselves to refrain from interference within the sphere of influence.
I believe the answer is D. When the economic diversification increases the standard of living
Answer: The Great Depression