Please answer the following question: Marjory LeBreton - Marjory LeBreton PC (born July 4 1940) is a former Leader of the Government in the Canadian Senate a position of cabinet-rank; and past national chair of Mothers Against Drunk Driving in Canada. She worked with four leaders of the Progressive Conservative Party of Canada - John Diefenbaker Robert Stanfield Joe Clark and Brian Mulroney - from 1962 to 1993 before being appointed to the Senate on the advice of Mulroney. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
Answer:
Office Holder