A) Peak X-Sharp increase in BOD, disappearance of clean water organisms, Distance downstream Peak Y - Increase in dissolved oxygen, Sewage reappearance of clean water organisms added
B) Peak X - Increase in dissolved oxygen, reappearance of clean water organisms, Peak Y - Sharp decline in dissolved oxygen, disappearance of clean water Organisms
C) Peak X - Sharp increase in BOD, appearance of clean water organisms, Peak Y - Increase in dissolved oxygen, disappearance of clean water organisms
D) Peak X - Increased number of anaerobic bacteria, disappearance of clean water organisms, Peak Y - Sharp decline in dissolved reappearance of clean water organisms
Correct Answer: A
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