Essay
Some highways have one lane; others have two, three, or more.If each lane costs $10 million per mile, an economist would assume that the total benefit of a three-lane highway must be:
A.less than $10 million per mile.
B.$10 to $20 million per mile.
C.$20 to $30 million per mile.
D.$30 million or more per mile.
Correct Answer:

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