Q9. Which of the following is the alternating periods of expansion and contraction in real GDP?

• business cycles
• depressions
• economic crises

Q10. Over the course of human history:

• economic growth has brought about substantial gains in incomes and standards of living in many countries.
• economic growth follows a steady, long-term upward path.
• all countries have achieved substantial gains in per capita GDP since the 19th century.