Within the music industry, four companies (UMG, Sony-BMG, EMI, and Warner) control 90 percent of the music you hear. The music industry operates in a(n) market structure.

oligopoly

Explanation:

From the question we are informed about the music industry with four companies (UMG, Sony-BMG, EMI, and Warner) control 90 percent of the music you hear. In this case the music industry operates in

oligopolistic market structure. Oligopolistic market can be regarded as a market structure whereby there is small number of firms in the market and they have similar products/services to offer. In this market only few of the firms are ruling the majority of the Market, and there is little compitition.

the answer is d

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