Sarah signed an agreement to rent an apartment from landlord who also signed the agreement. During the lease negotiation the landlord agreed to provide Sarah with extra storage space in the basement of the apartment building but this promise was not included in the agreement. The landlord now tells Sarah that he will not provide the extra space. If the landlord admits making the promise, under the parol evidence rule (select one)

he is legally required to provide the extra space because consideration is missing

he is legally required to provide the extra space because of his fiduciary duty to Sarah

he is required to provide the extra space because of the overconfidence trap

all of the above

two of the above

none of the above