Which did not cause significant navigation problems on inland waterways?

a. ice
b. variations in the heights of rivers
c. sand bars
d. sunken ships
e. inland piracy

e. inland piracy

Economics

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Which of the following limits the price a monopolist charges?

a. patents b. copyrights c. competition from other firms d. market demand e. market supply

Economics

In 2018, Janice Quinn sells a five-year-old car to Used Car, Inc. for $4,000. In the same year, Used Car, Inc. resells the car to Hilda Goner for $4,750. What is the contribution of these transactions to GDP in the year 2015?

A. $750 B. $0 C. $8,750 D. $4,000

Economics