World commodity prices over the past 150 years have

Question

Quizplus · Accepted Answer

World commodity prices have fluctuated greatly over the past 150 years, but the long-term trend has been downward due to factors such as technological advancements and increased productivity in the production of commodities. However, there have been occasional short-run increases due to factors such as supply disruptions or changes in demand. Thus, option B is the best choice as it recognizes both the long-term trend and short-term fluctuations.

World Commodity Prices Over the Past 150 Years Have