You open an e-mail from your friend that looks a little odd, but you figure your friend would never send you anything bad. This is _________ and is an _________ mistake.
You are a nice person, so you hold the door open for the person running in behind you. Since you needed to use your ID badge to open the door, the person running in behind you is __________; this is _________.
_________ is an attack in which the perpetrator uses social skills to trick or manipulate legitimate employees into providing confidential company information such as passwords.