In 1349 it resumed in Paris, spread to Picardy, Flanders, and the Low Countries, and from England to Scotland and Ireland as well as to Norway, where a ghost ship with a cargo of wool and a dead crew drifted offshore until it ran aground near Bergen. From there the plague passed into Sweden, Denmark, Prussia, Iceland, and as far as Greenland. Leaving a strange pocket of immunity in Bohemia and Russia unattacked until 1351, it had passed from most of Europe by the mid-1350s. Although the mortality rate was erratic, ranging from one-fifth in some places to nine-tenths or almost total elimination in others, the overall estimate of modern demographers has settled—for the area extending from India to Iceland—around the same figure expressed in Froissart’s casual words: “A third of the world dies.” His estimate, the common one at the time, was not an inspired guess but a borrowing of St. John’s figure for mortality from the plague in Revelation, the favorite guide to human affairs of the Middle Ages.
【題組】47 What does the underlined “it” in the first line refer to?
(A) The ghost ship
(B) The mortality
(C) The immunity
(D) The plague