How does comparing sources facilitate a historian's evaluation of sources?

Comparing sources would give more accuracy to historical events.

Explanation:

When researching new historical information consideration of the source,  is essential becomes crucial to the study as it credibility to the sources. The first tool a historian stressed is the comparison of the established sources about the study into consideration.    For instance, he reads of a new Sanskrit text discussing previous unknown aspects of the end of the Harappan Civilization. He would compare it with known Mesopotamian texts dealing with the same time, and compare it for accuracy. the trade relationship between the two provides insight into the economic aspects of the ancient civilizations.

answer; i believe that the correct answer is (decreased)