OG2 阅读 Q20

Choice B is the best answer. The data in the graph indicate that between 2002 and 2004 the difference in per-pound profits between fair trade and regular coffee was about $1. In this time period, fair trade coffee was valued at around $1.30 per pound and regular coffee was valued at around 20 cents per pound. The graph also shows that regular coffee recorded the lowest profits between the years 2002 and 2004, while fair trade coffee remained relatively stable throughout the entire eight-year span (2000 to 2008).
Choices A, C, and D are incorrect because they do not indicate the greatest difference between per-pound profits for fair trade and regular coffee.