题目内容
（请给出正确答案）
[主观题]
If we know each consumer's demand curve, we can derive the market demand curve by:().
If we know each consumer's demand curve, we can derive the market demand curve by:（).
A、vertically summing the individual demand curves.
B、horizontally summing the individual demand curves.
C、averaging the individual demand curves.
D、obtaining consumer incomes and summing them.
E、none of the above.
提问人：网友后慧珍
发布时间：2022-01-07
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