Answer:
A). They provide firsthand accounts of historical events.
Explanation:
Primary sources like artifacts or manuscripts, eyewitness or any other document are significant to historians as 'they provide firsthand accounts of historical events' without any adulteration and therefore, offer authentic and credible information. These sources serve as the organic matter which aids in proposing effective research or conclusion. Primary sources have a direct affiliation to the event or occurrence that would assist in offering more authentic and reliable information as compared to a secondary source contain chances of adulteration or manipulation. Thus, option A is the correct answer.
