What is the correct definition of a cybersecurity exploit?

Multiple choice question.

A tool or technique for taking advantage of a cybersecurity vulnerability to break into a system and cause harm.

A weakness or flaw in system security procedures, design, implementation, or control that compromises the safety of the system.

The act of executing malicious activity on a system, such as infecting it with a virus, installing spyware, or taking it hostage.

A hacker or intruder who exploits a flaw in system security to remotely access and threaten the security of a network.