Question: Which of the below statement ( s ) is / are correct? Selecting the relevant data by deciding which data sources to collect is a

Which of the below statement(s) is/are correct?
Selecting the relevant data by deciding which data sources to collect is a data reduction subtask.
Converting the numeric variables into discrete representations is a data consolidation subtask.
For numerical variables, normalizing the observed values between 0 and 1 is a data transformation subtask.
Reducing number of attributes in data is a data transformationsubtask.

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