Question $23(5$ points$)$

Which of the following would be admissible under the parol evidence rule? Assume the written contract was made on June $1,2018,$ and that it is an integrated document.

A letter dated July $9,2018,$ reciting agreement to new delivery terms

A chart showing the dates for delivery written on August $16,2018$

A copy of two letters while the parties were in the negotiation stage of their contract which showed agreement to a term not included in the June $1,2018$ contract

A copy of common carrier rules on the duty of delivery persons for uncrating merchandise, which is dated December $1,2006$