Given the 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. MV Alexia -  MV Alexia was one of nine Royal Dutch/Shell oil tankers converted to become a Merchant Aircraft Carrier (MAC ship). The group is collectively known as the Rapana class.MV Alexia was built at Bremer Vulkan and completed in April 1935 as an oil tanker for the Anglo Saxon Royal Dutch/Shell line. She was converted to a MAC ship entering service in December 1943.As a MAC ship she had no aircraft hangar and continued to carry normal cargoes although operating under Royal Navy control.
The answer is:
Mean Of Transportation