18. As a factor of production, the term capital includes:
(A) Natural resources such as land and water.
(B)Services provided by the government that enable businesses to be more productive.
(C)Stocks and bonds issued by corporations.
(D) Tools, machinery, and buildings.
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統計: A(0), B(0), C(0), D(1), E(0) #2818104
統計: A(0), B(0), C(0), D(1), E(0) #2818104