Definition of a Demand Curve?

[James]

All of the following apply to the definition of a demand curve EXCEPT:

A. Market demand is the sum of individual demand curves
B. Individual demand curves reflect individual or private benefits
C. Market demand reflects social costs
D. Market demand reflects private benefits

My gut wants to say C because demand usually defines the benefits of a good/service not the cost, that would be supply. But, D makes me wonder, Market Demand doesn't seem like it would describe a private benefit because it is the "Market" not the individual demand...

[Anjaree]

I do agree to go for C. The key is social or private. Demand will represent private cost and benefits.It is still a demand for one market of a good. Otherwise, it should be called an aggregate demand curve. Social cost is not added into demand curve.