A 500-Point Drop in the DJIA Was a Big Drop

Multiple Choice

A 500-point drop in the DJIA was a big drop when the DJIA was at 2246 in October of 1987 and a much smaller drop when the DJIA reached 11,421 in September of 2008. The percent by which stock prices fall is a more meaningful measure. The lesson here is that

A) rates are often more meaningful than counts.
B) it is easy to make a mistake calculating a percent.
C) the DJIA is a categorical variable.
D) confidentiality has been violated.