Ryder has been visiting his favorite park for ten years. Recently, he noticed that the large boulder in the center of the park has gotten smaller and smoother in some places. Why has the boulder changed?

Which of the following statements best describes the quantity theory of inflation? a.inflation occurs because production cost rise and this cost increase is passed on to consumers in the form of higher prices b. inflation occurs because there is too much money in the economy c. inflation occurs because demand of good and services exceeds existing supplies d. none of these