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← GeographyWhich outcome reduces fjord sediment oxygenation during stratification?
A)Increased bacterial respiration rate✓
B)Enhanced tidal mixing efficiency
C)Decreased ocean upwelling strength
D)Elevated riverine sediment load
💡 Explanation
Increased bacterial respiration reduces oxygen because microbial decomposition consumes oxygen in the sediments undergoing bacterial respiration; therefore, oxygen diminishes in those fjords, rather than increasing from mixing or less direct sources of material.
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