Which of the following statements about threats are true?

A threat is a weakness or lack of safeguard that can be exploited by vulnerability, thus causing harm to the information systems or networks.

A threat is a potential for violation of security which exists when there is a circumstance, capability, action, or event that could breach security and cause harm.

A threat is a sequence of circumstances and events that allows a human or other agent to cause an information-related misfortune by exploiting vulnerability in an IT product.

A threat is any circumstance or event with the potential of causing harm to a system in the form of destruction, disclosure, modification of data, or denial of service.