Which of the Following Statements Is True

Multiple Choice

Which of the following statements is true?

A) In 1820, only about 10 percent of world output was exported to foreign markets.
B) Economies were more closed at the beginning of the twentieth century than they were halfway through the century, in 1950.
C) Over the past 200 years, international trade throughout the world has grown more rapidly than world output.
D) In the late 1990s, the United States exported less than it did 500 years earlier.