Please answer the following question: Grafton D. Cushing - Grafton Dulany Cushing (August 4 1864 May 31 1939) was an American politician who served as 45th Lieutenant Governor for the Commonwealth of Massachusetts from 1915 to 1916. 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?
A:
Office Holder