The voyages of Christopher Columbus led to the first lasting European contact with the Americas, inaugurating a period of European exploration, conquest, and colonization that lasted for several centuries. Columbus was not the first European explorer to reach the Americas having been preceded by the Norse expedition led by Leif Erikson in the 11th century. Leif Erikson was an Icelandic explorer considered by some as the first European to land in North America (excluding Greenland), before Columbus. There is much debate as some say that many different people, spanning centuries, set foot on the New World (as the Americas were called) before Columbus, and, of course, the ancestors of the Native Americans had already discovered it many years before.
People used the telegraph to send messages via Morse Code. Which was a variation of taps on a small pad sending electronic pulses that would make a beeping sound. There would be someone on the other end that would listen to the pulses and write them down into words
The correct answer is that international volunteers fought on the Republican side in the Spanish Civil War.
The Republican side was formed around the Government, formed by the Popular Front, which in turn was composed of a coalition of Republican parties - Republican Left and Republican Union - with the Spanish Socialist Workers Party, which had joined the Marxists - Leninists of the Communist Party of Spain and the POUM, the Syndicalist Party of anarchist origin and in Catalonia the left nationalists led by Esquerra Republicana de Catalunya. It was supported by the labor movement and the UGT and CNT unions, which also pursued the social revolution. The Basque Nationalist Party had also opted for the republican side, when the republican courts were about to approve the Statute of Autonomy for the Basque Country.
Although it received hardly any external support from the allied powers of the Second World War, due to the International Non-Intervention Committee, the support of the USSR, which together with Mexico together with France and Poland at the beginning of the contest, stand out; they contributed large quantities of military equipment and advisors, notoriously also the support of what were called the International Brigades.
Metternich urged conservative rulers to act decisively and crush the dangerous uprisings. In response, a French army marched over the Pyrenees to suppress a revolt in Spain. Austrian forces crossed the Alps to smash rebellious outbreaks in Italy.
I believe A and C are correct.
