(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
(E) one agricultural engineer reports that farmers houses could be heated by the warmth from cows milk
Solution:
Modifier*
A case of hanging modifier. A noun is needed after comma and hence, A and B can be eliminated.
Farmers are the actual nouns using the technique and hence, should follow the comma for cogent meaning.
D is the best choice.
Sentence Correction - 1000 Questions with Solution: