Source: Pedro de Cieza de León, Spanish chronicler and soldier, *The Chronicles of Peru*, 1553.
'In past times, before the Spaniards entered this kingdom, there was a very great population along the valleys of the coast... but since the Spaniards entered and the native inhabitants died off, especially during the great pestilence that occurred when the Inca ruler Huayna Capac was alive, the majority of the valleys are now nearly deserted. The land is fertile and abundant, yet there are few left to cultivate it or to enjoy the great quantities of fruit, maize, and other crops that grow here. In these times, the indigenous peoples are so diminished in number that many valleys have lost almost their entire population, and only ruins of their former towns remain.'
Which of the following best explains the demographic decline described in the passage?
- AThe widespread use of superior military technology, such as firearms and steel armor, by Spanish conquistadors
- BThe forced migration and labor conditions associated with the growth of the transatlantic slave trade
- The lack of prior exposure and immunity among Indigenous populations to pathogens introduced from Afro-EurasiaCevap
- DThe disruption of long-distance land-based trade routes that previously connected South American empires to East Asian markets