Residence time for water in Lake Tahoe, Nevada/California is 600 years which means that
A. the water in Lake Tahoe will sustain aquatic life for 600 years.
B. a water molecule entering the lake will remain in the lake for 600 years.
C. outflow from Lake Tahoe occurs once every 600 years.
D. the total volume of water in Lake Tahoe remains constant for 600 years.
Answer: B
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