题目
题目
单项选择题

When the price of Blu-ray players dropped, the demand for DVD players went down. This tells us that DVD players and Blu-ray players are

选项
A.interchangeable products.
B.outsourced products.
C.superior products.
D.complementary products.
E.substitute products.
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标准答案
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思路分析
Consider the relationship between Blu-ray players and DVD players given in the scenario. When the price of Blu-ray players falls, consumers tend to buy more Blu-ray players instead of DVD players because Blu-ray and DVD players serve the same general purpose for movie playback; they can satisfy t......Login to view full explanation

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