Task: Question Answering
Input (English): From 1980 to 1990, the value of a share of stock of XYZ Corporation doubled every year. If in 1990 a share of the stock was worth \$80, in what year was it worth \$10?
(A)1984 (B)1985 (C)1986 (D)1987 (E)1988
Output (English): D