Refer to this link for the complete question: brainly.com/question/11018884
As I answered before, when a world war has just finished, the country's resources are depleted. So, it is difficult to provide jobs and houses for returning soldiers because these would require manpower and monetary resources. The period after the war is dedicated to picking up the scrap and trying to make do with what's available through cooperation. So, for me, the most appropriate course of action is helping labor unions work together with businesses.
The last one the route increased contact with foreign countries
The Colombian government and people have been at war with a group of communist drug traders and rebels known as the FARC
Political - British taking over Northern Ireland.
The majority of Northern Ireland's population were unionists, who wanted to remain within the United Kingdom. (The Norman invasion of the late 12th century )
Economic - Failure of potato crop. (The Great Famine)
Religious - discrimination against the Catholic/nationalist minority by the Protestant/unionist government and police force.
Answer : Mainly because economic problems. Since potatoes were no longer available in Ireland, the Irish would starve to death since potatoes were their main resource as food.
This brings to Irish migration to the US because it offered low paying jobs for immigrants. In the end, the Irish had minimum money and enough food for themselves in America, unlike in Ireland.