[Q]: Question: "What does the laser have that protects it?" Context: "A CD is read by focusing a 780 nm wavelength (near infrared) semiconductor laser housed within the CD player, through the bottom of the polycarbonate layer. The change in height between pits and lands results in a difference in the way the light is reflected. By measuring the intensity change with a photodiode, the data can be read from the disc. In order to accommodate the spiral pattern of data, the semiconductor laser is placed on a swing arm within the disc tray of any CD player. This swing arm allows the laser to read information from the centre to the edge of a disc, without having to interrupt the spinning of the disc itself." Answer:
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[A]: polycarbonate layer

[Q]: Question: "What type of residential areas are in Satelite?" Context: "North of the Historic Center, Azcapotzalco and Gustavo A. Madero have important industrial centers and neighborhoods that range from established middle-class colonias such as Claveria and Lindavista to huge low-income housing areas that share hillsides with adjacent municipalities in the State of Mexico. In recent years much of northern Mexico City's industry has moved to nearby municipalities in the State of Mexico. Northwest of Mexico City itself is Ciudad Satelite, a vast middle to upper-middle-class residential and business area." Answer:
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[A]: middle to upper-middle-class

[Q]: Question: "What network has not switched to a 24-hour schedule?" Context: "On October 9, 2006 at 6:00 a.m., the network switched to a 24-hour schedule, becoming one of the last major English-language broadcasters to transition to such a schedule. Most CBC-owned stations previously signed off the air during the early morning hours (typically from 1:00 a.m. to 6:00 a.m.). Instead of the infomercials aired by most private stations, or a simulcast of CBC News Network in the style of BBC One's nightly simulcast of BBC News Channel, the CBC uses the time to air repeats, including local news, primetime series, movies and other programming from the CBC library. Its French counterpart, Ici Radio-Canada Tele, still signs off every night." Answer:
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[A]: Ici Radio-Canada Tele

[Q]: Question: "Who were these stories about?" Context: "Intense media interest in the opinions and private lives of the royal family during the 1980s led to a series of sensational stories in the press, not all of which were entirely true. As Kelvin MacKenzie, editor of The Sun, told his staff: "Give me a Sunday for Monday splash on the Royals. Don't worry if it's not trueso long as there's not too much of a fuss about it afterwards." Newspaper editor Donald Trelford wrote in The Observer of 21 September 1986: "The royal soap opera has now reached such a pitch of public interest that the boundary between fact and fiction has been lost sight of ... it is not just that some papers don't check their facts or accept denials: they don't care if the stories are true or not." It was reported, most notably in The Sunday Times of 20 July 1986, that the Queen was worried that Margaret Thatcher's economic policies fostered social divisions and was alarmed by high unemployment, a series of riots, the violence of a miners' strike, and Thatcher's refusal to apply sanctions against the apartheid regime in South Africa. The sources of the rumours included royal aide Michael Shea and Commonwealth Secretary-General Shridath Ramphal, but Shea claimed his remarks were taken out of context and embellished by speculation. Thatcher reputedly said the Queen would vote for the Social Democratic PartyThatcher's political opponents. Thatcher's biographer John Campbell claimed "the report was a piece of journalistic mischief-making". Belying reports of acrimony between them, Thatcher later conveyed her personal admiration for the Queen, and the Queen gave two honours in her personal giftmembership in the Order of Merit and the Order of the Garterto Thatcher after her replacement as prime minister by John Major. Former Canadian Prime Minister Brian Mulroney said Elizabeth was a "behind the scenes force" in ending apartheid." Answer:
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[A]:
the royal family