Some doomsayers are warning that long-range warming or

Question

Some doomsayers are warning that long-range warming or cooling trends in weather patterns will drastically reduce grain production. More optimistic reports, however , point out that , even if such drifts in average temperature do occur, we should expect little change in grain production because there is little evidence that changes in rainfall patterns will occur. Moreover, for most crops, climate induced yield trends will be masked by both the year to year fluctuation of yields and by the enhancement of yields because of technological factors.

Which of the following is an assumption on which more optimistic reports mentioned in the passage are based?

a) Long â€“range changes in the weather patterns cannot be accurately predicted.
b) The growing of grain is so highly dependent on technological factors that improvements in yield are unlikely, regardless of climatic conditions 
c) Trends in rainfall patterns are more difficult to isolate than are trends in temperature.
d) Long range warming or cooling trends are more damaging to grain production if they are accompanied by changes in rainfall patterns than if they are not.
e)Long range cooling trends are potentially more destructive to grain production than are long range warming trends

Explanations please.

Best.

riteshgupta1 · Answer

Looks D to me


a) Long â€“range changes in the weather patterns cannot be accurately predicted. 

WE DONT KNOW THIS.

b) The growing of grain is so highly dependent on technological factors that improvements in yield are unlikely, regardless of climatic conditions 

TOO EXTREME, IT IS MENTIONED IN THE ARGUMENT BUT NOT TO THE LEVEL THIS CHOICE PROVIDES.

c) Trends in rainfall patterns are more difficult to isolate than are trends in temperature. 
 - WHO CARES...

d) Long range warming or cooling trends are more damaging to grain production if they are accompanied by changes in rainfall patterns than if they are not. 

-- THIS IS THE ONE NEGATE THIS AND ARGUMENT FALLS APART... 

e)Long range cooling trends are potentially more destructive to grain production than are long range warming trends 

-OK SO.. IF THEY ARE WHAT EFFECT ARE THEY GOING TO HAVE ON CROPS.

gglandt · Answer

I also go with D.

HIMALAYA · Answer

go with D ....

Supercat · Answer

(D), becuase that middle sentence suggests (assumes) that nothing except potential rainfall pattern changes would endanger grain yields.

Some doomsayers are warning that long-range warming or

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