A Historian is a professional in Social Sciences that specializes in the discipline of History. Their main objective is to research, study, analyze, interpret, and document facts of past human history. Like most branches of Social Sciences, there are several subcategories in which Historians divide themselves.
It should be A! From research and analysis
Mansa Mūsā left a realm notable for its extent and riches—he built the Great Mosque at Timbuktu—but he is best remembered in the Middle East and Europe for the splendour of his pilgrimage to Mecca (1324).