Answer:
D.)European explorers transmitted smallpox, decimating the native people of North and South America.
Step-by-step explanation:
The more well-known disease that is talked about that the Europeans tranferred is smallpox, but it also includes measles, whooping cough, chicken pox, bubonic plague, and typhus. In return, Europeans brought the disease syphilis back to Europe, which came in the the cases of sores on the body, rashes, and internal infections.