1. B
(The ancient Greeks first had the idea of putting vegetables on large flat pieces of bread, and ‘pizza ovens’ have been found in the ruins of Roman cities.)
2. B
(...the first tomatoes were not brought to Europe until the sixteenth century, from South America. It was the nineteenth century...)
3. A
(...Rafaele Esposito, a baker from Naples, began to sell the first modern pizzas. He was asked to bake a special pizza for a visit by the Italian King and Queen in 1889, and so the first pizza Margarita was created...)
4. B
(Pizza became a favourite dish in Italy, but it was after the Second World War, when thousands of American soldiers went home from Europe, that pizza really became an international dish.)