The correct answer is the third one: At one point, Spain was part of the Islamic world.
Spain was under Islamic rule between 711 AD and 1492 AD, year in which the last Islamic Kingdom of Granada was expelled by the Catholic Kings. The Iberian peninsula was conquered in 711 and integrated as a province of the Omayyad Caliphate. During all this period, Islamic culture flourished in Spain with great achievements in art, architecture, music, literature, philosophy, and other fields.
The Aftermath of World War II was the beginning of a new era, defined by the decline of all European colonial empires and simultaneous rise of two superpowers: the Soviet Union (USSR) and the United States (USA).
The stock market crashed in 1929 because investors had put too much capital into the stocks by borrowing large amounts of money that they did not truly have.
