Use the graph to answer the following question: The line graph shows the population during medieval period in England. The population, in millions, was 1.7 1086 CE. It was 3.1 in 1190 CE. It was 4 in 1220 CE. It was 4.2 in 1250 CE. It was 4.75 in 1279 CE. It was 4.7 in 1315 CE. It was 4.2 in 1325 CE. It was 4.8 in 1348 CE. It was 2.6 in 1351 CE. It was 2.5 in 1377 CE. It was 2.1 in 1400 CE. It was 2 in 1430 CE. It was 1.9 in 1450 CE. It was 2.4 in 1522 CE. It was 2.8 in 1541 CE. There is a change between 1315 CE and 1325 CE. Which of the following is the best explanation for this change? (4 points) a The Hundred Years' War b The Great Famine c The Mongol invasion d The Black Death