Answer: (1) Data mining
Explanation:
The data mining is used for analyses the correlation between the large of of data in the database management system (DBMS).
The main purpose of data mining is that it is used in database for the knowledge discovery and this technique also improve the relationship with the customers by reducing the various types of risks in the database system.
According to the question, the data mining is one of the demographic group which is used in the marketing. The main role of the data mining is that it collect some useful information from the huge amount of database.
Therefore, Option (1) is correct.