B. The Nazi invasion of Poland drew England and France into war against Germany.
The type of document is a letter
Well it depends do you mean how they are warned now or back then ?
Now: NHC issues a hurricane warning 36 hours in advance of tropical storm-force winds to give you time to complete your preparations
Back then: not sure on what the steps were but here is information about it—hurricane warning service was set up in the early 1870s from Cuba with the work of Father Benito Vines, who served as director of the Meteorological Observatory of the Royal College of Belén. He established a network of observation sites and developed the first method to forecast tropical cyclone movement,
Cosimo de' Medici, the first member of the Medici dynasty in Florence during the Italian Renaissance, rather tan an autocrat; was considered a "<em>primus inter pares</em>" (a latin phrase meaning "first among equals"), an honorary tittle for someone who is formally equal to other members of their group but are accorded unofficial respect, traditionally owing to their seniority in office.
Because he came from the elite, he took it seriously and worked patronicing and funding several important artists. For this, he was known as a "<em>Patron of the Arts</em>", this characterization gave him the reputation of a true leader. During his mandate, he was a great patron of learning, the arts and architecture, among other things.