The slope of a production possibilities frontier
A) is always varying.
B) measures the opportunity cost of producing one more unit of a good.
C) has no economic relevance or meaning.
D) is always constant.
Question 2
If the United States has a net export surplus, which of the following must be true?
A) Domestic private saving must be greater than net foreign investment.
B) Net foreign investment must be positive as well.
C) Domestic public saving must be greater than net foreign investment.
D) The balance on the financial account must equal the balance on the current account.
Measures of ocean chlorophyll-a concentrations from part of Atlantic Canada in (a) January 2006, and
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