Anita had received some upsetting news just before beginning her shift as a waitress. All evening long, Anita was taking people's orders incorrectly. She was also having trouble listening to her manager's direction. Which reason best explains Anita's poor work performance?

A. She was having a problem with physical noise.
B. She wasn't putting effort into her work.
C. She was doing too many things at once.
D. She was receiving too much information at once.
E. She was having a problem with psychological noise.