Natika Had Been Working at Abercrombie Industries for Six Months

Natika had been working at Abercrombie Industries for six months when her boss asked to see her in his office.She thought he wanted to talk about a promotion, so she was quite excited.However, instead of giving her a promotion, the boss told Natika she was being laid off as a result of company downsizing.Natika could feel her heart pounding as she listened to the news.Natika was able to find a new job, but every time her new boss asks to talk to her in private, Natika feels a little faint.In this example of classical conditioning, her pounding heart when her old boss delivered the bad news to Natika is:

A) an unconditioned stimulus
B) a conditioned stimulus
C) a conditioned response
D) an unconditioned response