Simply a glare screen, because it clearly states what it protects one against, I guess.
Answer:
I think its screenplay
Explanation:
Firstly, the question starts with an a so it can't be b. And format can't be repeated. Which leaves us with screenplay.
Hope this helps.
Answer:
Most displays in current use employ cathode ray tube ( CRT ) technology similar to that used in most television sets. The CRT technology requires a certain distance from the beam projection device to the screen in order to function.
