【单选题】

The passage supplies information that would answer which of the following questions

A、What accounts for the difference in rates of consumption in certain countries
B、What is the numerical factor by which per capita energy consumption exceeds physiological energy requirements
C、Which countries tend to have more sensitive ecosystems, those with small or large populations
D、What factor in calculating sustainability has Witkins neglected to consider in his theory of global development
E、What evidence is there for the notion that higher rates of consumption can be more important than population rates in calculating the impact of development