The percent decrease in average number of production hours per widget from 1990 to 2000 was approximately

A. if the quantity in Column A is greater;
B. if the quantity in column B is greater;
C. if the two quantities are equal;
D. if you cannot determine the relationship based on the given information

(A) 5
(B) 10
(C) 15
(D) 25
(E) It cannot be determined from the information given.