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What method is used to manage contention-based access on a wireless network?
Which of these are the two major sources of nitrate pollution in rivers?a. the burning of fossil fuels by factories and carsb. animal wastes and the burning of fossil fuels by carsc. animal wastes and fertilizersd. fertilizer runoff and the burning of fossil fuels by carse. animal wastes and the burning of fossil fuels by factories
