Which of the following can permanently damage an LCD display?

Which of the following can permanently damage an LCD display?
A. Rubbing the display.
B. Using a screen saver.
C. Not using a screen saver.
D. Turning brightness up too high.

[toggle title_open=”Close Me” title_closed=”Answer” hide=”yes” border=”yes” style=”default” excerpt_length=”0″ read_more_text=”Read More” read_less_text=”Read Less” include_excerpt_html=”no”]A[/toggle]