Which type of backup copies all files that were changed since the last backup, regardless of the
backup type of the last backup?

A.
full

B.
differential

C.
incremental

D.
user-defined

Explanation:

Reference:
http://wiki.answers.com/Q/Which_type_of_backup_copies_all_files_that_have_changed_since_the
_last_full_backup_regardless_if_they_have_been_backup_since_then