St. Patrick day is considered luckiest day for marriage, This is one of the weird marriage luck beliefs of Irish people. However, if the St. Patrick day falls in Saturday then it is not considered lucky to marry which is also one of the wedding superstition in Ireland that, Saturday is no luck day for marriage.
It would be B) European Migration
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The invention and introduction of hire purchase agreements.
Answer:
A referendum (plural: referendums or less commonly referenda) is a direct vote in which an entire electorate is invited to vote on a particular proposal. This may result in the adoption of a new law. In some countries, it is synonymous with a plebiscite or a vote on a ballot question.
Explanation:
Smallpox, the world health organization came up with a vaccine and had everyone vaccinated