18. Applying the parole evidence rule:

A. written contracts with ambiguous terms are automatically void and cannot be corrected.

B. oral agreements may be used to change a final written contract if the final written contract isn't exactly conforming to the pre-contract agreements.

C. written agreements may be used to change a final written contract if the final written contract isn't exactly conforming to the pre-contract agreements.

D. a written contract is the final expression of the party's agreement and may not be contradicted by oral or written agreements made prior to the writing.