The answer for this Q is (B). I do not understand why ? Can some one help explain ?
20. Despite the approach of winter, oil prices to indus-
trial customers are exceptionally low this year and
likely to remain so. Therefore, unless the winter is
especially severe, the price of natural gas to indus-
trial customers is also likely to remain low.
Which of the following, if true, provides the most
support for the conclusion above?
(A) Long-term weather forecasts predict a mild winter.
(B) The industrial users who consume most natural
gas can quickly and cheaply switch to using
oil instead.
(C) The largest sources of supply for both oil and
natural gas are in subtropical regions unlikely
to be affected by winter weather.
(D) The fuel requirements of industrial users of nat-
ural gas are not seriously affected by the
weather.
(E) Oil distribution is more likely to be affected by
severe winter weather than is the distribution
of natural gas.
I'll try to make some reasoning...
A, C and E are out of question. Doubt is in B vs D.
Both talk about the 'demand' of natural gas. D is unrelated to the argument which suggests that price of gas will increase if weather becomes severe.
Now since it is a fact that oil prices will not increase, so the reason that gas prices also will not increase can be that users can switch to using oil instead of gas.
Hope it makes sense.