A person calls and tells you that he has locked his account because he forgot his remote access password. He tells you that he doesn't have time to come down to your desk and positively identify himself because he is off-site at a customer facility and must present an important briefing to the customer within the next few minutes. He insists that he needs his remote access password changed immediately, but promises to come and see you after he returns to the office to verify his identity. What kind of social engineering tactic is being used in this attack?

A. Authority

B. Familiarity

C. Intimidation

D. Urgency