<span>The changes in agriculture in the Shang dynasty contributed to higher production levels. This in turn led to trade, settling and high birth rates. Thus, they became more organized which facilitated to other developments like writing.</span>
Answer:
B.new food crops, which improved the European diet
Explanation:
Answer A, C, and D were introduced to the Americas, not Europe. Some diseases, like syphilis, were brought to Europe but the majority were brought from the Europeans which greatly impacted the population of Native Americans. Western Europe was mostly impacted by the introduction of new crops.
Immigration to the north provided workers for production and replacements for soldiers killed or wounded.
The Qin dynasty by Emperor Shi Huang Di.
