Going over a course Review for Federal Real Property Lease Law and want to get a double check and see if i come up with the same answer: (Thank you in advance as this online learning experience was extremely difficult to follow along and confusing).

the doctrine of contra proferentem

1 allows consideration of evidence outside the written lease in deciding disputes

2 allows either party to pursue a cliam againt each other for breach of a lease

3 construes ambiguities in a written lease against the drafter of the document

4 prohibits any consideration of evidence outside the written contract in deciding disputes