It would be "c. Prince Henry the Navigator of Portugal" was is <span>considered a pioneer of the Age of Exploration, since the Portuguese were at the forefront of exploration and conquest in the New World. </span><span />
19th century: The American expansion was guided by the concept of <em>Manifest Destiny</em>, being that the people of the time believed it was their fate to expand and colonize the rest of the territory (that became what is now the U.S.), whilst pushing forward their virtues and institutions, with the urge to do so being irresistible to them.
20th century: The expansion of this period (that actually started in the final years of the century before) was called <em>Imperialism</em>, where the idea of gaining overseas territories, expanding American influence on international market by expanding their industry and trade.
Similarities and differences: In both periods there was an interest in expanding American territories, although the ideologies behind those movements where different: in the former the belief of forming a great country through force of will was their core motive; conflicts with other nations and cultures were consequences rather than the motif. In the later the economic and power interest where the reasons for doing so; the expansion had many morally questionable sub-tones, such as racism and an exaggerated me-before-you approach to all, with conflict and war being promoted by one president of the time (Theodore Roosevelt).
Answer:
The diffusion of crops and pathogens, including epidemic diseases like the bubonic plague, often occurred along trade routes.
The bubonic plague - named the Black Death by later historians - was caused by the Yersinia pestis bacteria, which lived in rodent populations and was spread by fleas that had bitten infected animals.
Once the plague transferred to animals that were in close contact with humans and to humans themselves, it began to spread along established trade routes.
It is difficult to measure the exact human cost of the plague due to limited records from the historical period.
Most historians think that the plague killed somewhere between 30% and 60% of Europe’s population between 1347 and 1351.
Explanation:
The stage of human social development and organization that is considered most advanced.
