Answer:
Answer: Historians have to be careful while studying the sources to draw accurate facts.Everyone extremely careful while studying History as it is the subject of concentration of mind.If we can't concentrate on this , no thing can be understand by us....THE MAIN FACTOR WHICH MAKE OUR HISTORY STRONG IS CONCENTRATION.....AND ALSO WHILE STUDYING THERE IS TO MUCH PINCH IN OUR MINDS , SO EVERYONE IS VERY CAREFUL WHILE STUDYING HISTORY.....
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