Identifying Water Pollution Sources
A water quality analysis reveals that River A has high levels of ammonia, whereas River B has low ammonia levels but a high biological oxygen demand (BOD). What is the most likely conclusion about the primary sources of pollution for these two 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 primarily affected by oil spills, River B by mining
D
River A is likely near agricultural runoff, River B near urban areas
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