Which of the Following Is a Main Reason Marketers Find

Which of the following is a main reason marketers find the Survey of Buying Power so useful?

A) It reports data from the Census every year
B) EBI is reported in only three categories, making it easy to use
C) It contains the BPI, which is an indicator of the market potential of a geographic area
D) The SBP is available in print only, but it is available once a week, and it is free of charge
E) The SBP has a "low readability" index which makes it simple to read