What data discovery process, whereby objects are categorized into predetermined groups, is used in text mining?

"Classification" is the correct answer to this question.

Explanation:

Classification is primarily a method of data processing, it makes easy for information to be separated and divided into a different business or personal goals by the data set demands.

It's also known as a mechanism of sorting or identifying information in different types of aspects or groups in the categorization of data. It is used to allocate the confidential information to the level of sensitivity.