Sentence Correction

Q)New hardy varieties of rice show promise of producing high yields without the costly requirements of irrigation and application of commercial fertilizer by earlier high-yielding varieties.


(A) requirements of irrigation and application of commercial fertilizer by earlier high-yielding varieties
(B) requirements by earlier high-yielding varieties of application of commercial fertilizer and irrigation
(C) requirements for application of commercial fertilizer and irrigation of earlier high-yielding varieties
(D) application of commercial fertilizer and irrigation that was required by earlier high-yielding varieties
(E) irrigation and application of commercial fertilizer that were required by earlier high-yielding varieties

New hardy varieties of rice show promise of producing high yields without the costly requirements of irrigation and application of commercial fertilizer by earlier high-yielding varieties.

(A) requirements of irrigation and application of commercial fertilizer by earlier high-yielding varieties
costly requirements ... by ..
Is not idiomatic


(B) requirements by earlier high-yielding varieties of application of commercial fertilizer and irrigation
requirements by Is not idiomatic
application of ..... irrigation - very bad



(C) requirements for application of commercial fertilizer and irrigation of earlier high-yielding varieties
irrigation of earlier high-yielding varieties - applyies only to irrigation alone


(D) application of commercial fertilizer and irrigation that was required by earlier high-yielding varieties
application of commercial fertilizer and irrigation that was - was is incorrect in reference to application and irrigation


(E) irrigation and application of commercial fertilizer that were required by earlier high-yielding varieties
OK
Idiom required by is used
Logical predication - OK


Answer is E


It seemes to that this question is from OG... There are perfect explanations of sentence correction

imo E

IMO E.

please post the OA.

Thanks,
Iwill.

Pls, help,
I want to know more of why "requirement by " is wrong. Normally we should use NOUN OF NOUN or NOUN'S NOUN .

Is my thinking correct?

for example, "the oil exploration by the company" is wrong. "The company's oil exploration" is correct.

please, detail why NOUN BY NOUN is wrong.