Which of these factors is the strongest sign that country b has a developed economy? a) multinational corporations operate within its borders. b) it is home to many high-tech companies. c) it has laws favorable to entrepreneurship d) it has a high gross domestic product.

The primary factor used to distinguish developed countries from developing countries is gross domestic product (GDP) per capita, a tally of all the goods and services produced in a country in one year, expressed in U.S. dollars. GDP is calculated by dividing a country's GDP by its population.

The correct answer is D: It has a high gross domestic product.

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