A. Leroy is the subject of the sentence
Answer:
The Black Death in England took place between mid-1348 and late-1349. In that nation, between a third and a half of the nation's inhabitants died due to the pandemic.
The Black Death caused an interruption in the ongoing Hundred Years' War between France and England. The decline in population caused wages to rise among the workers who remained, a development which was opposed by the landowners, which culminated in the uprising of 1381, which in turn eventually led to the abolition of serfdom in England.