A. exchange of goods and services among companies
B. buying and selling of imported goods
C. exchange of goods and services among citizens
D. buying and selling of goods and services among countries
Correct Answer: Option D
D. buying and selling of goods and services among countries
Hypothesis Testing
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Sampling Error And Sampling Bias
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Sample And Sampling Techniques
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Sources Of Literature - Project Writing
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Research Proposal Vs Research Abstract - Educational Research
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