Under the Parol Evidence Rule, Parties Cannot Vary the Terms

Multiple Choice

Under the parol evidence rule, parties cannot vary the terms of a(n) :

A) written contract by introducing evidence of terms allegedly agreed on prior to, or contemporaneous with the writing.
B) oral contract by introducing evidence of a written agreement.
C) written contract by introducing evidence of another writing signed after the original contract was drafted.
D) oral agreement by publishing notice of a subsequent modification.