Which of the following comes as one of the last steps that should be taken to ensure that the compromise cannot be traced back to the source of the problem?

An attacker has successfully compromised a remote computer. Which of the following comes as
one of the last steps that should be taken to ensure that the compromise cannot be traced back to

the source of the problem?

A.
Install patches

B.
Setup a backdoor

C.
Install a zombie for DDOS

D.
Cover your tracks