What is the image removal behavior for relocated images from a disk staging storage unit when the high water mark is reached during a backup?

What is the image removal behavior for relocated images from a disk staging storage unit when the high water mark is reached during a backup?
A . NetBackup removes the oldest images until the low water mark is reached.
B. NetBackup removes images alphabetically until the low water mark is reached.
C. NetBackup removes the largest images until the low water mark is reached.
D. NetBackup removes images with the lowest rank data classification until the low water mark is reached.

Answer: A