Task: Question Answering
Input (English): An increase in phosphate levels in a lake increases the population of algae in the lake. Increased algae blocks sunlight into the lake and results in a decrease in dissolved oxygen in the lake's water. Which of the following should be expected as a result?  
 (A) Plant populations in the lake increase. (B) More predatory birds feed on lake animals. (C) Phosphate levels in the lake decrease. (D) Fish populations in the lake decline.
Output (English): D