The correct answer is D. London.
The 30th Summer Olympics, officially known as the Games of the XXX Olympiad, were an international multi-sport event held from 27 July to 12 August 2012 in London, England. It was the first Summer Olympics to be held in London since 1908, and the third time overall, after the 1908 Summer Olympics and the 1948 Summer Olympics.
The 2012 Summer Olympics were the largest sports event ever held in the United Kingdom, with 204 nations and 10,568 athletes competing in 306 events in 26 sports. The Games were officially opened by Queen Elizabeth II, who was joined by her husband, Prince Philip, Duke of Edinburgh, and their son, Prince Charles, Prince of Wales.
The 2012 Summer Olympics were a major success, both in terms of the competition and the organization. The Games were widely praised for their high standards of performance, their innovative use of technology, and their positive impact on the host city.
The 2012 Summer Olympics were also a financial success, generating a surplus of £2.4 billion. This surplus was used to fund a number of legacy projects, including the London Legacy Development Corporation, which is responsible for the regeneration of the Olympic Park.
The 2012 Summer Olympics were a truly memorable event, and they will be remembered for many years to come.
The other options are incorrect for the following reasons:
- Option A, Liverpool, is a city in England. It was not the host city of the 30th Summer Olympics.
- Option B, Lancashire, is a county in England. It was not the host city of the 30th Summer Olympics.
- Option C, Las Vegas, is a city in Nevada, United States. It was not the host city of the 30th Summer Olympics.