题目内容（请给出正确答案）

[单选题]

Suppose a consumer has preferences over two goods, X and Y, which are perfect substitutes. In particular, two units of X is equivalent to one unit of Y. If the price of X is $1, the price of Y is $3,

A.30 units of X and 0 units of Y

B.0 units of X and 10 units of Y

C.15 units of X and 5 units of Y

D.15 units of X and 0 units of Y

提问人：网友awfi_cfl 发布时间：2022-01-07

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· 有3位网友选择 D，占比37.5%
· 有3位网友选择 B，占比37.5%
· 有1位网友选择 A，占比12.5%
· 有1位网友选择 C，占比12.5%

ABCD

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