Which of the following orders correctly represents the trend in eutrophication?
A Lack of oxygen → Death of aquatic organisms → Massive algal growth
B Excess nitrates and phosphates → Massive algal growth → Lack of oxygen → Death of aquatic organisms
C Heavy mineralization → Lack of oxygen → Massive algal growth
D Excess nitrates and phosphates → Lack of oxygen → Massive algal growth → Death of aquatic organisms
Answer is B
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