I would say D because in order to be flexible you have to be able to work around or with something in orded for it to still work hope this helped!!
I believe you will find all your answers here,
http://www.csun.edu/prospectivestudents/cost-attendance
The answer is number 3.libary
There really is no getting it back, if it is from a virus, then you need to buy a new computer. If it is something internal, depending on what type of computer you have it might just be best to buy a new one. Hope this helps :-)
Voltage tester, Circuit finder, Screwdrivers and nut drivers specific to electricians, Pliers, measuring tape
