4.During some period of time it is observed that the price of prerecorded
cassette tapes has fallen but the quantity bought and sold has
remained about constant. The best explanation for this is:
- Manufacturing costs of cassette tapes have fallen and the price
of compact disks (CDs) has risen.
- Manufacturing costs of cassette tapes have fallen and the price
of CDs has fallen.
- Manufacturing costs of cassette tapes have risen and the price
of CDs has fallen.
- Manufacturing costs of cassette tapes have risen and the price
of CDs has risen.
- Manufacturing costs of cassette tapes have fallen and the price
of tape decks has fallen.
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