Which method would you use to load data into the Oracle database?

You are using flat files as the data source for one of your data warehousing applications. To
optimize the application performance, you plan to move the data from the flat files to
clustered tables in an Oracle database. While migrating the data, you want to have minimal
impact on the database performance and optimize the data load operation. Which method
would you use to load data into the Oracle database?

A.
Use the external table population.

B.
Use the Oracle Data Pump export and import utility.

C.
Use the conventional path data load of the SQL*Loader utility.

D.
Use the INSERT INTO…SELECT command to load the data.