The Number of Catalogs Being Sent to Individual Carrier Routes

the number of catalogs being sent to individual carrier routes is small,a database

A) can add special incentives such as product samples.
B) can add names to qualify for U.S. postal discounts.
C) is less effective since the customer base is too small to segment.
D) is more effective since the customer base does not have to be segmented.
E) can generate generic catalogs to use instead of targeted ones.