The population of fish in a pond in relation to the number of years since stocking is depicted on a graph. For the first few yea
rs after the pond is stocked, the population grows slowly. It increases more quickly as the fish reproduce, then it levels off. A pollutant kills off almost all of the fish 20 years after stocking. The population begins to grow again when the remaining fish reproduce. Which graph depicts the situation described above? 
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