Multiple Choice
Use the following to answer question: 
-(Table: Production Possibilities for Machinery and Petroleum) Use Table: Production Possibilities for Machinery and Petroleum.In the United States the opportunity cost of producing 40 units of machinery is _____ units of petroleum.
A) 80
B) 60
C) 40
D) 20
Correct Answer:

Verified
Correct Answer:
Verified
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