Which of the following most logically completes the argument?
Utrania was formerly a major petroleum exporter, but in recent decades economic stagnation and restrictive regulations inhibited investment in new oil fields. In consequence, Utranian oil exports dropped steadily as old fields became depleted. Utrania's currently improving economic situation, together with less-restrictive regulations, will undoubtedly result in the rapid development of new fields. However, it would be premature to conclude that the rapid development of new fields will result in higher oil exports, because __________.
For certain question types, outside information is allowed. For others, outside information is not allowed.
Take the snow/car problem for example, this is a paradox question which asks you to find a logical explanation.
汽车车主知道冬天的积雪会将树枝压断打到车上,所以在冬天的时候他们根本没有把车放到树下
This is a possible reason, thus, a correct answer. If in winter, most cars are garaged, there won't be as many case of damage by smashing snow as when cars are parked under a tree. In fact, a paradox question invites outside information if the information can resolve the perplexing situation. What is your choice for this question? Why?
Back to the oil field/export question, it is a variant of paradox question. You are asked to find a logical explanation based on the available info. B is a logical reason to support the conclusion. Case closed.