Please answer the following question: Sun Towers - The Sun Towers is a high-rise building complex located in Chatuchak district in Bangkok Thailand.The towers are all located in the North Bangkok Business District.The building complex has a total of 3 buildings: Sun Tower 1 Headquarters Ericsson (40 floors) Sun Tower 2 (32 floors) Sun Tower 3 (22 floors) 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:
Building