John is analyzing strange behavior on computers in his network. he believes there is malware on the machines. the symptoms include strange behavior that persists, even if he boots the machine to a linux live cd. what is the most likely cause?

The answer is Boot sector virus. A boot sector virus is malware that infects the computer storage sector where startup files are found. The boot sector contains all the files required to start the operating system (OS) and other bootable programs.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."

okay what's the question?