The answer is option D "a document made by someone who actually saw an event." A primary source would be like a witness during a event. They can give reliable information on what happened during that event. Main primary sources are: documents, pictures or photographs, and objects that can explain what happened during a event.
Hope this helps!
How did the sales approach change after Mulcahy became the CEO of Xerox?
Xerox shifted their approach to be less product conform and more contact and expense adjust. They shifted their consultative selling model to advise customers solve business problems rather than just placing more materials in their office.
White Sands Missile Range
D. 18th century I believe.
