Answer:
He is legally expected to provide the space under the overconfidence trap
Step-by-step explanation:
The landlord was overconfident about his judgment abilities and was quick to make the promise to provide the extra space without thinking of a wider range of possibilities. Thereby exposing himself to a greater risk than he imagined. The parole evidence is an evidence of oral speech. Since he admitted making the promise to Sarah, he is legally expected to provide the space.