APFIVE Identifying Water Pollution Sources
In an experiment, two water samples from different rivers were analyzed. River A showed high levels of ammonia, while River B had low ammonia levels but high biological oxygen demand (BOD). What does this suggest about human activity near these rivers?
A
Both rivers are predominantly affected by thermal pollution
B
Both rivers are in pristine condition with minimal human impact
C
River A is likely near agricultural runoff, River B near urban areas
D
River A is primarily affected by oil spills, River B by mining
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