27.The parol evidence rule refers to the:

Select one:

a. oral evidence given by the defendant during a hearing.

b. idea that when the parties have expressed their agreement in a complete, unambiguous writing, the writing is the best evidence of their intent.

c. rule that perjury in criminal sentences is a non-bailable offense.

d. use of the equitable doctrine of promissory estoppel to prevent parties from seeking compensation under the statute of frauds.