It could be a variety of answers some examples could be something relating to the technology, or the advancements of this time period. Anything relating to that would be fine!
German declaration of Submarine Warfare
Zimmerman Telegrams
They became more populated. Some would say more pollution was in the air.
The Economy changed in many ways.
-Seth
I think that the answer is D
Answer:
The Great Famine, also known as the Great Hunger, the Great Starvation, the Famine, or the Irish Potato Famine, was a period of mass starvation and disease in Ireland from 1845 to 1849.
Explanation:
that is a nice long answer hope it helps!