AMC8 1997 Problem 16

Penni Precisely buys \$ 100 worth of stock in each of three companies: Alabama Almonds, Boston Beans, and California Cauliflower. After one year, AA was up 20 \%, \mathrm{BB} was down 25 \%, and \mathrm{CC} was unchanged. For the second year, AA was down 20 \% from the previous year, BB was up 25 \% from the previous year, and \mathrm{CC} was unchanged. If A, B, and C are the final values of the stock, then

Answer Choices
A. A=B=C
B. A=B<C
C. C<B=A
D. A<B<C
E. B<A<C