338. If a single strain of plant is used for a given crop over a wide area, a practice fostered by modern seed-marketing methods, it increases the likelihood that the impact of a single crop disease or pest will be disastrous.
(A) If a single strain of plant is used for a given crop over a wide area, a practice fostered by modern seed-marketing methods, it
(B) If a single strain of plant is used for a given crop over a wide area, as is fostered by modern seed-marketing methods, it
(C) A practice fostered by modern seed-marketing methods, a single strain of plant used for a given crop over a wide area
(D) A single strain of plant used for a given crop over a wide area, a practice fostered by modern seed-marketing methods,
(E) The use of single strain of plant for a given crop over a wide area, a practice fostered by modern seed-marketing methods,
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