GRE Text Completion Question 416

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Source: XDF

Cultivation of a single crop on a given tract of land leads eventually to decreased yields, this can be (i)_____by crop rotation, denying the pathogens a suitable host for a period of time. However, even if crops are not rotated, the severity of diseases often (ii)_____after a number of years as the microbial population of the soil changes and the soil becomes “(iii)_____” to those diseases.

A Intensified D enhance G vulnerable
B resolved E altered H suppressive
C cured F decrease I receptive

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