Consider the following entry in /etc/passwd: sync::0:0:sync pseudouser:/var/empty:/sbin/sync
Which of the following is NOT true?
a. this should be considered a horrible security vulnerability
b. the user requires no password to log in
c. upon successful login, sync will be run and the user will be logged out
d. the user bypasses local ACLs, like root typically does

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Answer (a) with a mirror like surface;