题目内容
（请给出正确答案）
[主观题]
What does the author mean by giving the examples of the US and the Sahara Desert in Paragr
aph Two？
A．The US is the wealthiest country in the world while the Sahara Desert is the poorest region.
B．Some regions of the world are well supplied with natural resources while other regions possess none of them.
C．Some countries can better use natural resources while other countries have been unable to develop their resources.
D．The US has a sound and stable political condition while the Sahara Desert has suffered for many years from civil wars.
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