By use of the ___________ it is based on the optical illusion that areas of very small black dots appear as gray, since the eye cannot distinguish the individual dots without magnification.

By use of the ___________ it is based on the optical illusion that are

1.	By use of the ___________ it is based on the optical illusion that areas of very small black dots appear as gray, since the eye cannot distinguish the individual dots without magnification.
A.	No tone screen
B.	Full tone screen
C.	Half tone screen
D.	Medium tone screen
Answer» D. Medium tone screen