The Suez Canal between the Sinai Peninsula (Asia) and the rest of Egypt (Africa).
The ridgeline of the Darien Mountains, where water flows different directions on either side (the watershed boundary), and Colombia and Panama meet, is a common dividing line for the Americas.
Answer:
C + D
Explanation:
I realized just as I was about to send this that you got the question wrong. I am so sorry!
Answer: Francis Bacon was the first to formalize the idea of a proper scientific method, but he didn't do so in a vacuum. The work of Nicolaus Copernicus (1473-1543) and Galileo Galilei (1564-1642) influenced Bacon tremendously.