Question $4$

An outside nongovernment$-$affiliated group posted a message online claiming responsibility

for shutting down the pipeline of a large oil and gas company. The group claims to have

performed this through a vulnerability in the company's supervisory control and data

acquisition $($SCADA$)$ equipment that controls the flow through the pipes. What BEST

describes this group of attackers?

Nation$-$state

Hacktivist

Insider threat

Advanced persistent threat