Which of the following statements correctly describes the “Password guessing against single user” attack? (a) The attack

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Which of the following statements correctly
describes the “Password guessing against single user” attack?
(a) The attacker tries various possibilities to guess the
password of a given user
(b) The attacker tries various possibilities to guess the
password of any user
(c) The attacker sticks to a given user whom has been previously
researched by the attacker to collect information about
(d) The attacker tries to steal the password of the user while
the user has left their computer unattended