Answer Happy

Which of the following statements is
correct?
(a) Hacktivists (activist intruders) are often those who conduct
advanced persistent attacks
(b) Acquiring initial access and/or privilege escalation are
examples of behaviors of intruders
(c) After an intruder accomplishes their attack, they feel free
to reveal their presence
(d) Firewalls are exactly similar to IDSs as both investigate
network traffic to detect vulnerabilities and take no actions