[Q]: Question: "What is the highest definition support listed"  Context: "In November 2008, 720p HD support was added. At the time of the 720p launch, the YouTube player was changed from a 4:3 aspect ratio to a widescreen 16:9. With this new feature, YouTube began a switchover to H.264/MPEG-4 AVC as its default video compression format. In November 2009, 1080p HD support was added. In July 2010, YouTube announced that it had launched a range of videos in 4K format, which allows a resolution of up to 4096×3072 pixels. In June 2015, support for 8K resolution was added, with the videos playing at 7680×4320 pixels."  Answer:
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[A]: 8K


[Q]: Question: "What type of news fails to fill the gap?"  Context: "An analysis of the evolution of mass media in the US and Europe since World War II noted mixed results from the growth of the Internet: "The digital revolution has been good for freedom of expression [and] information [but] has had mixed effects on freedom of the press": It has disrupted traditional sources of funding, and new forms of Internet journalism have replaced only a tiny fraction of what's been lost."  Answer:
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[A]: Internet


[Q]: Question: "Where are all the boroughs located?"  Context: "New York City is located on one of the world's largest natural harbors, and the boroughs of Manhattan and Staten Island are (primarily) coterminous with islands of the same names, while Queens and Brooklyn are located at the west end of the larger Long Island, and The Bronx is located at the southern tip of New York State's mainland. This situation of boroughs separated by water led to the development of an extensive infrastructure of bridges and tunnels. Nearly all of the city's major bridges and tunnels are notable, and several have broken or set records."  Answer:
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[A]: on one of the world's largest natural harbors


[Q]: Question: "What was a first when it was introduced?"  Context: "In October 2013, the company announced the "Save a Page" feature which allows any Internet user to archive the contents of a URL. This became a threat of abuse by the service for hosting malicious binaries."  Answer:
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[A]:
Save a Page