- A primary source is a historical record created by an individual who existed in the ancient eras.
- The historical investigation that had the broadest spatial frame was the discovery of trade routes between Asian and European nations.
<h3>What is an investigation?</h3>
An investigation is a process of critically examining and identifying something related to any subject matter.
- The sources formed by the ancient historians or individuals in their respective eras are defined as primary sources. They can be manuscripts, artistic creations, books, novels, etc.
- The identification of trade routes through the silk road among the nations of Europe and Asia was one of the investigations of history having the largest frames.
Therefore, the record created by past individuals is the primary source, and the trade routes between Europe and Asia were the longest investigation.
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Answer:
C- Separation of powers
Explanation:
Seperation of power is the system whereby responsibilities and power are divided and assigned to various arm of the gvernment inorder to ensure effecient and effective delivery of the dividends of democracy to the citizens.
This principle recognizes the fact that, despite the laws and rules of the federal government oft United States, the individual states in US also has its own power to enact laws that would enable it to deliver. This laws may be contrary to the federal laws.