As the subject of the thread is pretty clear...
I request any one of you from Manhattan Staff help me to resolve the above query in the following question
New hardy varieties of rice show promise of producing high yields without 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
OG: E