Task: Question Answering
Input (English): In a certain neighborhood, the number of cats is inversely proportional to the number of dogs. At one point, there were 10 cats and 50 dogs in the neighborhood. If today there are 20 dogs in the neighborhood, how many cats are in the neighborhood?
(A)4 (B)8 (C)15 (D)20 (E)25
Output (English): E