I believe it is 2, good luck
The modern world is today with language and technology. It began on the 1 AC (After christ) Pre-historic was in the BC (Before christ) was when we didn't have out own place and not all known a language.
Hoped I helped!
The best answer among your choices is letter B. Turkey builds a dam, restricting the flow of the Euphrates in Syria. I hope you are satisfied with my answer and feel free to ask for more if you have more clarifications and questions
Answer Franklin D. Roosevelt
Explanation: