Between 1845 and 1852, Ireland endured a major famine caused by A. a potato blight.
B. mild weather.
C. crop surpluses.
D. locust attacks.

A: a potato blight.

Explanation:

The Great Famine, also known as the Great Hunger, the Famine or the Irish Potato Famine, was a period of mass starvation and disease in Ireland from 1845 to 1852. The Great Famine was caused by a failure of the potato crop, which many people relied on for most of their nutrition. A disease called late blight destroyed the leaves and edible roots of the potato plants in successive years. If you have any questions please comment below. E2021, have a great day.

c. the king has significantly abused the colonists' rights many times over a long period of time.