What are two reasons that AAA server logs are useful in protecting the network and users? (Choose two.)

What are two reasons that AAA server logs are useful in protecting the network and users? (Choose two.)
A . Due to the nature of AAA logging, AAA server logs always indicate actual attack attempts.
B . Most AAA server log authentication failures, an excessive number of which may point the security analyst to a brute force attack.
C . Authentication logs track the success and failure of legitimate users with a time stamp record.
D . AAA server logs are very minimal and actually do not yield much information.

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Answer: BC