Answer:
Correct answer is penicillin
<span>The correct answer should be A. The work required on plantations could only be done by slaves. The slaves were even cheaper than indentured servants and could be controlled more easily. They could just import them and keep them forever while indentured servants often caused problems like the famous Bacon's rebellion.</span>
Thomas Woodrow Wilson was an academic and American statesman and was the 28th President of the United States from 1913 up until 1921. He used the expanded or extended power of the presidency to encourage a far reaching reform program to upsurge the government’s part in the economy.
Answer:
I would consider the adoption of gun powder
Explanation:
gun powder changed the world and is still widely used today for guns, explosives and rockets.