Tom Is on Trial for Robbery

Tom is on trial for robbery. The prosecution called two witnesses:
· Karen testified that she was on duty as a cashier at a Hamburger Haven, a drive-thru fast food restaurant, when Robbie drove up to her window. She claimed he aimed a large gun in her face and demanded all the money in the cash drawer. Karen testified that she fainted and when she awoke the police told her that someone took all the money.
· Lonnie testified that he was at the grill preparing burgers and fries when he heard a man say something about money and Karen screaming. When he looked up, he saw what he believed was a blue Ford driving away. He said that the car "laid rubber" going around the curve in the exit drive-way. Which of the following, if established at trial, could be used to impeach Karen?

A) She has bad eyesight and did not get a good look at the robber's face.
B) She is new at her job and afraid her boss will think she stole the money.
C) She has a prior felony conviction for theft.
D) All of these can be used to impeach Karen.