I dont understand the question plz add more context.
Answer:
a fortified boundary line running through dense populations
Explanation: :()
The United States first began developing nuclear weapons in 1939, during World War II, under the order of President Franklin Roosevelt. Motivation was the fear that US was engaged in a race with Nazi Germany to develop nuclear weapon. This project is best known as Manhattan Project.
Answer:
the Declaration of Independence, which stated that governments derive their powers “from the consent of the governed,” and the Constitution.
Not 100% sure but i would go with B