Write an If clause to determine whether the user pressed the Backspace key.

Which of the following is not true about printing and deleting an Excel worksheet?

a. If you attempt to delete a worksheet with data, Excel will display a warning and permit you to cancel the deletion. b. In Normal view, the vertical dotted line between columns indicates that as currently arranged, only the columns to the left of the dotted line will print on the first page. c. It is necessary to delete unused sheets to save storage space and remove any doubt that additional information is in the workbook. d. Scaling shrinks the width (or height) of the printed worksheet to fit a maximum number of pages, and is convenient for printing formulas.

You should use exception handling

a. in all your programs b. only when you can not handle the exception with simpler control structures c. only when you use classes d. in every function