Answer: Social
Explanation: I just got it right on my world history work
Explanation:
Geocentric model of planets was proposed by Ptolemy. It stated that all sun, planets and stars revolve round the earth in circular orbits.
D.Black codes
Step by step:
Scientist Louis Pasteur came up with the food preparing process known as pasteurization. He also developed a vaccination for anthrax and rabies.
Answer:
The Silk Road and other trade routes had become too dangerous, expensive and time consuming
Explanation:
Trade routes to Asia and the Middle East had become very dangerous for Europeans because non-friendly empires like Ottoman Empire and the Persian Empire were the middlemen between Europe and Asia.
For this reason, Europeans were pushed to explore alternative trade routes to Asia. In fact, Columbus idea was to sail west to find a new route to Asia, he never expected to land on a whole new continent.