One way to help the audience to focus on slide content is to hide the ________ graphics

When you use a stored procedure to insert or update one or more rows, the procedure usually returns

A. the column names and values for invalid input parameters B. a message that indicates whether the database engine threw an exception C. a copy of the last row that was updated or inserted D. a value that indicates the number of rows that were successfully processed

Why is the alias mechanism useful?

What will be an ideal response?