Suppose Bianca buys a used a textbook from Sebastian for $55. If Bianca's surplus from this transaction was $10, we can infer that:

A. Bianca's reservation price was $45.
B. Sebastian's reservation price was $45.
C. Bianca's reservation price was $60, and Sebastian's reservation price was $50.
D. Bianca's reservation price was $65.


Answer: D

Economics

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Economics