[Q]: Question: "What is amplified by playback equipment?" Context: "Due to recording mastering and manufacturing limitations, both high and low frequencies were removed from the first recorded signals by various formulae. With low frequencies, the stylus must swing a long way from side to side, requiring the groove to be wide, taking up more space and limiting the playing time of the record. At high frequencies, hiss, pops, and ticks are significant. These problems can be reduced by using equalization to an agreed standard. During recording the amplitude of low frequencies is reduced, thus reducing the groove width required, and the amplitude at high frequencies is increased. The playback equipment boosts bass and cuts treble so as to restore the tonal balance in the original signal; this also reduces the high frequency noise. Thus more music will fit on the record, and noise is reduced." Answer:
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[A]: bass

[Q]: Question: "What mind altering plant could you have and not get into as much trouble as before?" Context: "Left-wing politics have been particularly strong in municipal government since the 1960s. Voters approved charter amendments that have lessened the penalties for possession of marijuana (1974), and that aim to protect access to abortion in the city should it ever become illegal in the State of Michigan (1990). In 1974, Kathy Kozachenko's victory in an Ann Arbor city-council race made her the country's first openly homosexual candidate to win public office. In 1975, Ann Arbor became the first U.S. city to use instant-runoff voting for a mayoral race. Adopted through a ballot initiative sponsored by the local Human Rights Party, which feared a splintering of the liberal vote, the process was repealed in 1976 after use in only one election. As of August 2009, Democrats hold the mayorship and all council seats. The left tilt of politics in the city has earned it the nickname "The People's Republic of Ann Arbor". Nationally, Ann Arbor is located in Michigan's 12th congressional district, represented by Democrat Debbie Dingell." Answer:
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[A]: marijuana

[Q]: Question: "Which took place earlier, the onset of the Crusades or the expulsion of the Jews from England?" Context: "With the onset of the Crusades in 1095, and the expulsions from England (1290), France (1394), and parts of Germany (15th century), Jewish migration pushed eastward into Poland (10th century), Lithuania (10th century), and Russia (12th century). Over this period of several hundred years, some have suggested, Jewish economic activity was focused on trade, business management, and financial services, due to several presumed factors: Christian European prohibitions restricting certain activities by Jews, preventing certain financial activities (such as "usurious" loans) between Christians, high rates of literacy, near universal male education, and ability of merchants to rely upon and trust family members living in different regions and countries." Answer:
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[A]: onset of the Crusades

[Q]: Question: "Which group represents a larger percentage of the population, those with full-blooded indigenous descent or those that are mestizo or part-indigenous with European admixture?" Context: "About five percent of the population are of full-blooded indigenous descent, but upwards to eighty percent more or the majority of Hondurans are mestizo or part-indigenous with European admixture, and about ten percent are of indigenous or African descent. The main concentration of indigenous in Honduras are in the rural westernmost areas facing Guatemala and to the Caribbean Sea coastline, as well on the Nicaraguan border. The majority of indigenous people are Lencas, Miskitos to the east, Mayans, Pech, Sumos, and Tolupan." Answer:
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[A]:
mestizo or part-indigenous with European admixture