The correct option is: "Swaziland"
During the first decades of the twentieth century, the British Empire had a population of about 458 million people and about 33,700,000 km², which meant approximately a quarter of the world's population and a fifth of the land area. This makes it the first largest empire in history. The culminating period of the empire took place for about a hundred years (the so-called imperial century, developed between 1815 and 1914), through a series of expansion phases related to trade, colonization and conquest, as well as periods of diplomatic activity . Probably, the point of maximum imperial boom can be between 1880 and 1930.