If the national economy shrank at an annual rate of 5% per year for four consecutive years, then the economy shrank by 20% over the four-year period.

Choose the correct answer below and, if necessary, fill in the answer box to complete your choice.

A. The statement is false because each year there is a different reference value. The economy actually shrank by _____% over the four-year period.

(Type an integer or decimal rounded to the nearest tenth as needed.)