Multiple Choice
Figure: Basic Supply and Demand
M 
In a free market, as illustrated in the diagram, total gains from trade are greatest when:
A) 60 units are sold at a price of $2.
B) 40 units are sold at a price of $3.
C) 60 units are sold at a price of $4.
D) 50 units are sold at a price of $3.
Correct Answer:

Verified
Correct Answer:
Verified
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