When doing research, economists a. follow the scientific method: observation, theory, and more observation b. cannot use experiments, as they are often done in areas like physics and chemistry. c. have to use whatever data the world happens to give them d. all of the above

d. All of the above

Explanation:

Based on the information provided within the question when doing research all of the answers provided are correct. Any field doing research should follow the scientific method, but Economists cannot use the same experiments as other fields because they have to use the data that the world happens to give them and do not have the ability to make control groups and test different variables on the economy like experiments in the field of Physics and Chemistry can.

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two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.