Q20 in the 1820s anthracite coalfields opened in

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------------------------------------------------------------------------------------------------ Q20: In the 1820’s, anthracite coalfields opened in eastern Pennsylvania, and when canals and eventually railroads reached into the region, there were substantial supplies of coal that was exported to the nation’s growing mills, forges, factories, and railways. A. when canals and eventually railroads reached into the region, there were substantial supplies of coal that was
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B. once canals and eventually railroads reaching into the region, there were substantial supplies of coal having been C. with canals and eventually railroads reaching into the region, there had been substantial supplies of coal D. canals and eventually railroads reached into the region, with substantial supplies of coal being E. as canals and eventually railroads reached into the region, substantial supplies of coal were Answer: ------------------------------------------------------------------------------------------------------------ Q21: According to entomologists, single locusts are quiet creatures, but when locusts are placed with others of their species, they become excited, change color, vibrate, and even hum. ------------------------------------------------------------------------------------------------------------ Q22: A study by the Ocean Wildlife Campaign urged states to undertake a number of remedies to reverse a decline in the shark population, which includes the establishment of size limits for shark catches, closing state waters for shark fishing during pupping season, and requiring commercial fishers to have federal shark permits. ------------------------------------------------------------------------------------------------------------ Q23: Goronian lawmaker: Goronia’s Cheese Importation Board, the agency responsible for inspecting all wholesale shipments of cheese entering Goronia from abroad and rejecting shipments that fail to meet specified standards, rejects about one percent of the cheese that it inspects. Since the health consequences and associated costs of not rejecting that one percent would be negligible, whereas the cost of maintaining the agency is not, the agency’s cost clearly outweighs the benefits it provides. Knowing the answer to which of the following would be most useful in evaluating the lawmaker’s argument?
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A. Are any of the types of cheeses that are imported into Goronia also produced in Goronia? B. Has the Cheese Importation Board, over the last several years, reduced its operating costs by eliminating inefficiencies within the agency itself?
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