Choose the correct definition of purchasing power parity. In the long run, a unit of currency can buy the same quantity of goods and services anywhere in the world.
In the long run, a unit of currency buys the same amount of a good for a poor person as a rich person.
The currency exchange rate between two nations will always gravitate toward 1 to 1.
The exchange rate from currency A into currency B is the reciprocal of the rate from B into A.

The business cycle is the periodic but irregular up-and-down movement in economic activity, measured by fluctuations in real gross domestic product (gdp) and other macroeconomic variables. a business cycle is typically characterized by four phases—recession, recovery, growth, and decline—that repeat themselves over time. economists note, however, that complete business cycles vary in length. the duration of business cycles can be anywhere from about two to twelve years, with most cycles averaging six years in length. some business analysts use the business cycle model and terminology to study and explain fluctuations in business inventory and other individual elements of corporate operations. but the term "business cycle" is still primarily associated with larger (industry-wide, regional, national, or even international) business trends.

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Answer i believe the answer is a theme;