Color images are scanned but on review of the resulting bitonal images there are empty spaces where

there are red letters on the original pages.
What is the most likely cause of this problem?

A.
Red is the drop-in color.

B.
Red is the drop-out color.

C.
Red is the threshold color.

D.
Red cannot be seen in a bitonal image.

Explanation:
The answer should be “B” as drop-out is usedto drop background colors of shaded paper.