Demi Grayson works for Viorst Caterers. Graysons doctor has recommended that she have surgery. If she has the surgery, she will be unable to work for a month. The owner and president of Viorst says, Dont worry, your job here is safe. When youre well enough, come back. When Grayson returns one month later, she is fired for taking so much time off. Explain the legal theory that might give Grayson a cause of action against Viorst.