- 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.
Learn more about the primary sources in the related link:
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The Maginot Line was the primary defense for the French during World War 2.
During the eight years between Iraq's formal declaration of war on September 22, 1980, and Iran's acceptance of a cease-fire with effect on July 20, 1988, at the very least half a million and possibly twice as many troops were killed on both sides, at least half a million became permanent invalids, some 228 billion
B. No right for the federal government to levy taxes
Explanation:
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With the above article, you should take into consideration the bias. The correct answer is D.