Final answer:
Mikey is considering moving in with someone when his lease expires.
Step-by-step explanation:
The subject of the question is lease agreements.
In the given scenario, Mikey mentions that his lease is up at the end of the month and suggests moving in with the person he is talking to. From this, it can be inferred that Mikey is considering moving in with someone as an option when his lease expires. Therefore, option b) Mikey is considering moving in with someone is the correct answer.