[Q]: Question: "What incredibly hard substance helped protect people from the elements thousands of years ago?"  Context: "The Mesolithic period in the Indian subcontinent was followed by the Neolithic period, when more extensive settlement of the subcontinent occurred after the end of the last Ice Age approximately 12,000 years ago. The first confirmed semipermanent settlements appeared 9,000 years ago in the Bhimbetka rock shelters in modern Madhya Pradesh, India. Early Neolithic culture in South Asia is represented by the Bhirrana findings (7500 BCE) in Haryana, India & Mehrgarh findings (7000–9000 BCE) in Balochistan, Pakistan."  Answer:
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[A]: rock shelters


[Q]: Question: "what is the first time period mentioned?"  Context: "From the 1987 season until the late 1990s, the most exposure the league would receive was on ESPN, which aired tape-delayed games, often well after midnight, and often edited to match the alloted time slot. The league received its first taste of wide exposure in 1998, when Arena Bowl XII was televised nationally as part of ABC's old Wide World of Sports."  Answer:
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[A]: 1987


[Q]: Question: "Whats it called when programs run slow?"  Context: "Seemingly, multitasking would cause a computer that is switching between several programs to run more slowly, in direct proportion to the number of programs it is running, but most programs spend much of their time waiting for slow input/output devices to complete their tasks. If a program is waiting for the user to click on the mouse or press a key on the keyboard, then it will not take a "time slice" until the event it is waiting for has occurred. This frees up time for other programs to execute so that many programs may be run simultaneously without unacceptable speed loss."  Answer:
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[A]: speed loss


[Q]: Question: "What did the Irish and Germans of Tammany Hall have in common?"  Context: "In the 19th century, the city was transformed by development relating to its status as a trading center, as well as by European immigration. The city adopted the Commissioners' Plan of 1811, which expanded the city street grid to encompass all of Manhattan. The 1825 completion of the Erie Canal through central New York connected the Atlantic port to the agricultural markets and commodities of the North American interior via the Hudson River and the Great Lakes. Local politics became dominated by Tammany Hall, a political machine supported by Irish and German immigrants."  Answer:
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[A]:
immigrants