Critical Reasoning

In recent years the climate has been generally cool in northern Asia. But during periods when the average daily temperature and humidity in northern Asia were slightly higher than their normal levels the yields of most crops grown there increased significantly. In the next century, the increased average daily temperature and humidity attained during those periods are expected to become the norm. Yet scientists predict that the yearly yields of most of the region's crops will decrease during the next century.

Which one of the following, if true, most helps to resolve the apparent paradox in the information above?

(A) Crop yields in southern Asia are expected to remain constant even after the average daily temperature and humidity there increase from recent levels.
(B) Any increases in temperature and humidity would be accompanied by higher levels of atmospheric carbon dioxide, which is vital to plant respiration.
(C) The climate in northern Asia has generally been too cool and dry in recent years for populations of many crop insect pests to become established.
(D) In many parts of Asia, the increased annual precipitation that would result from warmer and wetter climates would cause most edible plant species to flourish.
(E) The recent climate of northern Asia prevents many crops from being farmed there during the winter.

[spoiler]OA Later
Source LSAT[/spoiler]

IMO C.Time taken:1.45.

Whats the OA?

The crops have benefited from above normal temperature only when such temperatures have been in periods.So if the temperature becomes permanently above normal,the crop yeild will be better.But what if the higher temperature is coupled with some other situation which is harmful for crops.If pests can grow well in warm climate compared to cold climate then its a problem for crops.

paes wrote:In recent years the climate has been generally cool in northern Asia. But during periods when the average daily temperature and humidity in northern Asia were slightly higher than their normal levels the yields of most crops grown there increased significantly. In the next century, the increased average daily temperature and humidity attained during those periods are expected to become the norm. Yet scientists predict that the yearly yields of most of the region's crops will decrease during the next century.

Which one of the following, if true, most helps to resolve the apparent paradox in the information above?

(A) Crop yields in southern Asia are expected to remain constant even after the average daily temperature and humidity there increase from recent levels.
(B) Any increases in temperature and humidity would be accompanied by higher levels of atmospheric carbon dioxide, which is vital to plant respiration.
(C) The climate in northern Asia has generally been too cool and dry in recent years for populations of many crop insect pests to become established.
(D) In many parts of Asia, the increased annual precipitation that would result from warmer and wetter climates would cause most edible plant species to flourish.
(E) The recent climate of northern Asia prevents many crops from being farmed there during the winter.

[spoiler]OA Later
Source LSAT[/spoiler]

only C can explain the paradox. choose C

I will go with 'C'. Pls post OA.

OA is C.