Please answer the following question: Information: - Centrica plc is a British multinational utility company with its headquarters in Windsor, Berkshire. Its principal activity is the supply of electricity and gas to businesses and consumers in the United Kingdom, the Republic of Ireland and North America. It is the largest supplier of gas to domestic customers in the UK, and one of the largest suppliers of electricity, operating under the trading names Scottish Gas in Scotland and British Gas in England and Wales. It owns Bord Gais Energy in the Republic of Ireland. It is also active in the exploration and production of natural gas; electricity generation; and the provision of household services including plumbing. - Windsor is a historic market town and unparished area in the Royal Borough of Windsor and Maidenhead in Berkshire, England. It is widely known as the site of Windsor Castle, one of the official residences of the British Royal Family. - British Gas is an energy and home services provider in the United Kingdom . It is the trading name of British Gas Services Limited and British Gas New Heating Limited , both subsidiaries of Centrica . Serving around twelve million homes in the UK , British Gas is the biggest UK energy supplier and is considered one of the Big Six dominating the gas and electricity market in the United Kingdom . The brand British Gas remains from the demerger of the British Gas Corporation in 1997 , which formed Centrica , BG Group and Transco . The British Gas Corporation was a result of the restructuring of the UK gas industry following the Gas Act 1972 . The act merged all of the area boards and created the British Gas Corporation . The British Gas Corporation was privatised as British Gas plc by the Thatcher government and on 8 December 1986 its shares were floated on the London stock market . Centrica trades as Scottish Gas in Scotland . 'british gas' is related to which object entity through the relation of 'headquarters location'? Choices: - ireland - maidenhead - scotland - united kingdom - windsor
A:
windsor