Which of the Following Was NOT an Element of the Green

Which of the following was NOT an element of the Green Revolution of the 1970's and 1980's?

A) Integrated pest management to reduce the need for chemical pesticides
B) High yielding cereal varieties that responded well to fertilizers and irrigation
C) Greatly expanded use of irrigation water and chemical fertilizers
D) Monocultural systems that maximized the effects of the new varieties and technologies
E) Integration of the scientific efforts of plant breeders,soil scientists,agronomists and pest management specialists