Record companies defend their substitution of laser-read compact discs (CDs) for the much less expensive traditional long-playing vinyl records in their catalogs by claiming that the audio market is ruled by consumer demand for ever-improved sound reproduction rather than by record manufacturers profit-motivated marketing decisions. But this claim cannot be true, because if it were true, then digital audiotape, which produces even better sound than CDs, would be commercially available from these same record companies, but it is not.
Which of the following, if true, would most strengthen the argument against the record companies claim?
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