Directions:
You want to perform multiple backups of only those files that are modified since the last normal backup. You also want to ensure that the backed up files use minimum amount of media.

Question:
In this case, you will take:

Option A):
Incremental backup.
Option B):
Differential backup.
Option C):
Copy backup.
Option D):
Normal backup.

Correct Answer is Option A):
Incremental backup.