Sarah is vacationing in Canada from the United Kingdom she would like to purchase a souvenir t-shirt to take back to her sister as a gift what should sarah do

Which event was one of the greatest factors that led to massive emigration from ireland to the united states in the mid-1800s? a) world war i b) the civil war c) the irish potato famine d) colonization of the new world plz fastest and right answer gets 94 !