To answer this question, you need to understand the process of removing procedures in a database.
Let's go through each option to understand why it is correct or incorrect:
Option A) Use a drop procedure statement to drop a standalone procedure. - This option is correct because when removing a standalone procedure, you can use the "DROP PROCEDURE" statement to remove it from the database.
Option B) Use a drop procedure statement to drop a procedure that is part of a package. Then recompile the package specification. - This option is incorrect because when removing a procedure that is part of a package, you need to drop the package, not just the procedure. Additionally, after dropping the package, you would need to recompile both the package specification and the package body.
Option C) Use a drop procedure statement to drop a procedure that is part of a package. Then recompile the package body. - This option is incorrect for the same reasons mentioned in Option B. When removing a procedure that is part of a package, you need to drop the entire package, and then recompile both the package specification and the package body.
Option D) For faster removal and re-creation, do not use a drop procedure statement. Instead, recompile the procedure using the alter procedure statement with the REUSE SETTINGS clause. - This option is incorrect because using the "ALTER PROCEDURE" statement with the "REUSE SETTINGS" clause does not remove the procedure from the database. It only recompiles the procedure with the existing settings.
The correct answer is A) Use a drop procedure statement to drop a standalone procedure. This option is correct because when removing a standalone procedure, you can use the "DROP PROCEDURE" statement to remove it from the database.