The best and most correct answer among the choices provided by your question is the third choice which "<span>are written and created by a eyewitness to an event."
</span>Primary sources<span> are the raw materials of history — original </span>documents <span>and objects which were created at the time under study. They are different from secondary </span>sources<span>, accounts or interpretations of events created by someone without firsthand experience.</span>
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a word (other than a pronoun) used to identify any of a class of people, places, or things ( common noun ), or to name a particular one of these ( proper noun ).