A Woman Sells Scarves to Passersby on a Busy City

A woman sells scarves to passersby on a busy city street during the week of Independence Day.Three months later,the city council passes a law making street vending illegal.Could the woman be found guilty of violating the new law?

A) Yes, but only if she was being libelous.
B) No, because the woman broke law over a holiday weekend.
C) No, as it is considered an ex post facto law.
D) Yes, particularly if the law was passed because she was making a disturbance.
E) Maybe, but only if the law is not considered a bill of attainder.