How does stock differ from flow?

A. A flow concept is a value at a point in time, while a stock concept has meaning over a specified period of time.
B. A flow concept has meaning over a specified period of time, while a stock concept is a value at a point in time.
C. The do not differ; both flow and stock concepts are values at a point in time.
D. They do not differ; both flow and stock concepts have meaning only over a specified period of time.


Answer: B

Economics

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