If 20 units of a good (X) can be purchased by 1 JD at Jan, 1, 2015. Assuming the inflation during 2015 reflects on prices of all goods and services that at Dec, 31, 2015, the 1 JD can purchase only 16 units of the good (X) 14. What is the general price index? * (2 Points) a) 25% b) 80% c) 125% d) 180%