A(n) __________ is a special value that cannot be mistaken as a member of a list of data items and signals that there are no more data items to be processed.

When grouping worksheets in a workbook, you can group this number of worksheets

A) Only two B) Any number C) Only three

For each of the preceding ping commands, provide an explanation of why the command succeeds or fails.

What will be an ideal response?