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Meanwhile, with the advent and popularity of Internet-based distribution of files in lossily-compressed audio formats such as MP3, sales of CDs began to decline in the 2000s. For example, between 2000 - 2008, despite overall growth in music sales and one anomalous year of increase, major-label CD sales declined overall by 20%, although independent and DIY music sales may be tracking better according to figures released 30 March 2009, and CDs still continue to sell greatly. As of 2012, CDs and DVDs made up only 34 percent of music sales in the United States. In Japan, however, over 80 percent of music was bought on CDs and other physical formats as of 2015.

What has caused a decrease in CD sales?
Answer: Internet-based distribution of files
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Prior to the Golden Age of Mandolins, France had a history with the mandolin, with mandolinists playing in Paris until the Napoleonic Wars. The players, teachers and composers included Giovanni Fouchetti, Eduardo Mezzacapo, Gabriele Leon, and Gervasio. During the Golden age itself (1880s-1920s), the mandolin had a strong presence in France. Prominent mandolin players or composers included Jules Cottin and his sister Madeleine Cottin, Jean Pietrapertosa, and Edgar Bara. Paris had dozens of "estudiantina" mandolin orchestras in the early 1900s. Mandolin magazines included L'Estudiantina, Le Plectre, École de la mandolie.

Who were the players and composers during this time?
Answer: Giovanni Fouchetti, Eduardo Mezzacapo, Gabriele Leon, and Gervasio
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In a response to Livingstone, Theodore Dobzhansky argued that when talking about race one must be attentive to how the term is being used: "I agree with Dr. Livingstone that if races have to be 'discrete units,' then there are no races, and if 'race' is used as an 'explanation' of the human variability, rather than vice versa, then the explanation is invalid." He further argued that one could use the term race if one distinguished between "race differences" and "the race concept." The former refers to any distinction in gene frequencies between populations; the latter is "a matter of judgment." He further observed that even when there is clinal variation, "Race differences are objectively ascertainable biological phenomena… but it does not follow that racially distinct populations must be given racial (or subspecific) labels." In short, Livingstone and Dobzhansky agree that there are genetic differences among human beings; they also agree that the use of the race concept to classify people, and how the race concept is used, is a matter of social convention. They differ on whether the race concept remains a meaningful and useful social convention.

Livingston and Dobzhansky disagree on whether the race concept is what?
Answer:
a meaningful and useful social convention