Mary's mother June is 88 years old and blind. A roofing contractor, Jim, enters into a contract to repair June’s roof for $100,000. He is polite and non-threatening, and June appears to understand what is happening. Although there is no written agreement, Jim records June's agreement on his mobile phone. Soon afterwards, Mary finds out and is horrified. She applies to the court with June's consent to have the contract rescinded. What cause of action would Mary and June most likely succeed with?
A. Duress
B. Undue influence
C. Unconscionable conduct
D. Non est factumn