Item $49$ of $90($Exam A$,$ Q$59)$A technician received a call stating that all files in a user's documents folder appear to be Changed, and each of the files now has a look file extension Which pf the followingactions is the FIRST step the technician should take? A$.$ Runa live disk clone. B$.$ Run a full antivirus scan. C$.$ Use a batch file to rename the filesD. Disconnect the machine from the network