Please answer the following question: Nantucket Regional Transit Authority - Nantucket Regional Transit Authority (NRTA) is the public transport authority on the island of Nantucket in Massachusetts USA. It operates a network of shuttle buses. It is branded using blue and white colors and also known as the NRTA Wave. 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:
Company