Which of the following scenarios would make a DNS sinkhole effective in thwarting an attack?

Which of the following scenarios would make a DNS sinkhole effective in thwarting an attack?
A . An attacker is sniffing traffic to port 53, and the server is managed using unencrypted usernames and passwords.
B . An organization is experiencing excessive traffic on port 53 and suspects an attacker is trying to DoS the domain name server.
C . Malware trying to resolve an unregistered domain name to determine if it is running in an isolated sandbox
D . Routing tables have been compromised, and an attacker is rerouting traffic to malicious websites

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Answer: D