Which of the Following Is Not Not True

Which of the following is not not true?

A) The parol evidence rule does not affect the interpretation of express words already in a contract.
B) The parol evidence rule does not prevent evidence of oral contracts entered into after the written contract.
C) The parol evidence rule excludes evidence of oral contracts entered into after the parties enter into a written contract.
D) The parol evidence rule permits evidence of oral contracts entered into after the parties entered the written contract.
E) The parol evidence rule excludes terms that were discussed before entering a contract but were not included in the contract.