How Do You Convert a Price of a Good from an Earlier

Multiple Choice

How do you convert a price of a good from an earlier time into today's price?

A) Take the earlier price and divide by today's price, then multiply by the ratio of the consumer price index (CPI) today to that of the CPI in the old year.
B) Take the earlier price and multiply by the ratio of the earlier gross domestic product (GDP) deflator to today's CPI.
C) Take today's price and divide by the earlier price in terms of the GDP deflator.
D) Take the earlier price and multiply by the ratio of today's CPI to the earlier CPI.
E) Take the earlier price and multiply by the ratio of the earlier CPI to the current CPI.