Unless new reserves are found soon the world rsquo s supply of coal is being depleted in such a way ...........

Logical Reasoning(Insurance) Statement - Conclusions

Unless new reserves are found soon, the world’s supply of coal is being depleted in such a way that with demand continuing to grow at present rates, reserves will be exhausted by the year 2050.

Which of the following, If true, would most weaken the above arrangement?

There has been a slowdown in the rate of increase in world demand for coal over the last 5 years from 10% to 5%.

It has been known for many years that there are vast stocks of coal under Antarctica which are yet to be economically exploited.

Oil is being used increasingly in place of Coal for many industrial and domestic uses.

As Coal resources are depleted more marginal supplies, which are more costly to produce and less efficient in use, are being mined.

None of the above

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Explanation:

statement (a) states that demand of coal is still increasing at 5% per annum therefore the argument is not weakened by the statement. Statement (b) does not affect the argument that stocks will be depleted unless new reserves are found because it considers the reserve in Antarctica. statement (c)informs that there is an alternative to coal which is being used increasingly. (d) states an economic fact of life that would have to be faced if the statements in the paragraph are true.so neither (a), (b), (c) or (d) is appropriate.