Given the question: USS Roper (DD-147) -  USS Roper (DD-147) was a Wickes-class destroyer in the United States Navy later converted to a high-speed transport and redesignated APD-20.She was named for Lieutenant Commander Jesse M. Roper commanding officer of Petrel who died during the Spanish-American War while rescuing his crew.Her keel was laid down on 19 March 1918 by William Cramp & Sons in Philadelphia Pennsylvania. She was launched on 17 August 1918 sponsored by Mrs. Jesse M. 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?
The answer is:
Mean Of Transportation