If You Were Required to Write a Paper for Your

If you were required to write a paper for your history class (or a report for your job) in which you were using dollar valued data across different years,you would

A) use a price index to remove the effects of inflation to have reliable data measuring changes in the real value of things.
B) never attempt to correct for inflation because inflation is a key indicator of economic activity.
C) tell your teacher or boss that you never learned how to correct data for inflation.
D) assume that prices did not change during the period you are studying.