单项选择题

Demand for cocaine in the United States, combined with the ultimately futile war on drugs, has led to the ______ in violence.

A. upsurge
B. engagement
C. extension
D. generation
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James regretted his decision to come to ______ appeared to him to be a backward, run-down, poverty-stricken island.
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No sooner ______ the door than his wife found him out.
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