In an agricultural region,
A) Spring planting and application of fertilizers and herbicides can result in concentration spikes of these chemicals in rivers, due to spring rains.
B) Crops generally use the fertilizer applied to enhance their growth very efficiently.
C) Herbicides and pesticides are retained in the soil and do not present a water-pollution threat.
D) The use of filter strips in riparian zones (areas adjacent to streams) has not been demonstrated to be effective in reducing nutrient loading of streams.
Correct Answer:
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