____________ is the feature that works with Windows Backup to enable the back up of all files, including those that an application might have open currently

As defined in the text, the pointer variable head

a. is the first node in the list b. points to the first node in the list c. is always NULL d. is undefined

Thesortinstruction can only be used within the _____ tag.

A. ? B. ? C. ?Either a. or b. D. ?Neither a. nor b.