Several Marketing Data Services Provide Information on Household Demographics and Lifestyle,purchases,TV

Several marketing data services provide information on household demographics and lifestyle,purchases,TV viewing behavior,etc.The principle advantage of these services is that

A) one service can collect, analyze, interrelate, and present this information.
B) all data collection and analysis is computerized, so the results are almost instantaneous.
C) members of the firm can be included in the analysis of data, making the results more reliable.
D) the service gets paid on a percentage basis; the better the information, the higher the fee.
E) firms using these services get discounts if they share their customer data with competitors.