Judy, a Widow, Just Sold a Piece of Property

Judy, a widow, just sold a piece of property. She will live off that money during her retirement. Judy dotes on her son, Chris, who asks her to invest her money in his restaurant, which is faltering. He tells her that if she does not lend him the money she will never see him again. She is afraid of being alone and agrees to his request, but soon changes her mind and asks for her money back. Chris claims they have formed a binding contract. What is your conclusion?

A) The contract is voidable based on duress.
B) The contract is valid because it was a unilateral mistake.
C) The contract is voidable based on undue influence.
D) The contract is voidable based on fraud.