C. Discovering vaccination and microbial fermentation
A microbiologist who discovered microorganisms cause fermentation. Eg. leading to food spoilage
The answer is B because the Mechanical Reaper changed the way the world worked at the time; It made the demand for slaves go up as the work necessitated some manual work
Genghis khan is the founder and the first ruler during the Mongol period in 13 Century BC. Mongol invasions had great impact on Europe during medieval period.
The military powers of Mongolians were great and they were the first to conquer most of the western world. The wide spread bubonic plague which was planned by Mongols resulted in a genocide when huge population of Europe was killed.
After his conquer of Eurasia there was peace and he initiated the activity of trade and business in the Silk route.
Answer:
his empire was disintegrating due to oppositions from the nationalists but he being a Federalist
Explanation:
