According to Your Text, Profitable Use of a Database Requires

According to your text, profitable use of a database requires:

A) keeping track of sales using at least three criteria: postcode of purchasers, frequency of purchase and monetary value of purchase.
B) keeping track of sales using at least three criteria: postcode of purchasers, speed in taking up an offer and monetary value of purchase.
C) keeping track of sales using at least three criteria: recency of purchase, frequency of purchase and monetary value of purchase.
D) keeping track of sales using at least three criteria: recency of purchase, speed in taking up an offer and monetary value of purchase.
E) all of the above