Which of the following statements accurately describes viruses?

$1$ point

Viruses are standalone programs that can replicate and spread independently without needing a host file or program.

Viruses are deceptive programs that disguise themselves as legitimate software.

Viruses are self$-$replicating programs that attach themselves to legitimate files or programs.

Viruses are individuals who attempt to gain unauthorized access to systems or networks, often by exploiting vulnerabilities or by deceiving authorized users.