Answer:
A. Jack cannot bring in the evidence of the oral agreement because of the Parol Evidence Rule.
Step-by-step explanation:
The Parol Evidence rule is a rule in the Anglo-American common law that governs or determines the types or kinds of evidence that parties to a contract dispute can introduce when trying to determine the specific terms of a contract.
The rule also prevents introduction of further evidences by a party after a final written document or agreement has been reached. Things such as the content of oral discussions from earlier in the negotiation process, as evidence of a different intent as to the terms of the contract. The rule states that "extrinsic evidence is inadmissible to vary a written contract". The term " patrol" refers to "word of mouth" hence it is referred to oral pleadings in a court case.
Therefore from the question, Jack cannot bring in evidence of oral agreement into the court for evaluation because of Patrol Evidence Rule.