C answer is correct. ref.: https://www.techopedia.com/definition/4025/multipartite-virus
Why ? A multipartite virus is a fast-moving virus that uses file infectors or boot infectors to attack the boot sector and executable files
simultaneously.
A multipartite virus is a computer virus that’s able to attack both the boot sector and executable files of an infected computer. If you’re familiar with cyber threats, you probably know that most computer viruses either attack the boot sector or executable files. Multipartite viruses, however, are unique because of their ability to attack both the boot sector and executable files simultaneously, thereby allowing them to spread in multiple ways.
Types of Viruses
Multipartite Viruses
A multipartite virus (also known as a multipart virus or hybrid virus) combines the approach of file infectors and boot record infectors and attempts to simultaneously attack both the boot sector and the executable or program files. (P.937/921)
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