Question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. John C. Butler-class destroyer escort -  The John C. Butler-class destroyer escort originated during World War II. The lead ship was USS John C. Butler commissioned on 31 March 1944. The class was also known as the WGT type from their Westinghouse Geared Turbine drive.
Answer:
Mean Of Transportation