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1.        By installing special electric pumps, farmers’ houses could be heated by the warmth from cows’ milk, according to one agricultural engineer.

(A) farmers’ houses could be heated by the warmth from cows’ milk, according to one agricultural engineer

(B) the warmth from cows’ milk could be used by farmers to heat their houses, according to one agricultural engineer

(C) one agricultural engineer reports that farmers could use the warmth from cows’ milk to heat their houses

(D) farmers, according to one agricultural engineer, could use the warmth from cows’ milk to heat their houses（D）

(E) one agricultural engineer reports that farmers’ houses could be heated by the warmth from cows’ milk

为何说 A) installing和farmers’ houses逻辑关系错。

同上,

Farmers通过installing special electric pumps,,,,,,use the warmth from cows’ milk to heat their houses（D）

逻辑主语是Farmers