To answer this question, you need to understand SQL commands for manipulating data in a database table.
Let's go through each option to understand why it is correct or incorrect:
Option A) DELETE - This option is correct because the DELETE command is used to remove one or more rows of data from a table in a SQL database.
Option B) UNION - This option is incorrect because the UNION command is used to combine the result sets of two or more SELECT statements.
Option C) SELECT - This option is incorrect because the SELECT command is used to retrieve data from a database table, not delete it.
Option D) INSERT - This option is incorrect because the INSERT command is used to add new rows of data into a table, not delete existing data.
The correct answer is A) DELETE. This option is correct because the DELETE command is specifically designed to delete data from a SQL database table.