In general, the parol evidence rule states that:

(A) A contract may never be altered in any way, under any conditions.

(B) Oral evidence will not be admissible to add to or change a contract once it is reduced to writing.

(C) Oral evidence relating to a contract will not be admissible under any circumstances whatsoever.

(D) Only partially integrated contracts will be open to interpretation by the court.

(B) Oral evidence will not be admissible to add to or change a contract once it is reduced to writing.

Step-by-step explanation

parol evidence is the evidence of antecedent negotiation. parol evidence rule is a contract law doctrine that prevents the introduction of evidence of prior negotiations or agreements that contradict, add or change contractual terms of a written contract in cases where the written contract is intended to be complete and is expressing the final agreement of the parties. when parties to a contract make and sign a completely integrated written contract, parol evidence cannot be accepted to vary or contradict what is written in the contract.