Answer:
A. There was a drought, followed by a cold winter, leading to a bad wheat harvest.
Step-by-step explanation:
There were many harvest failures during 1787-1788 because of the shortage of wheat. Bread was the main source of food and without that, many people ended up starving. Harsh winters and lack of water are seemed to have caused this, but since peasants were the lowest class, a majority of them starved.