With no explanation, chose the best option from "A" or "B". Mandy has set up an appointment to discuss extra credit work with her professor, who has told her that he has a doctors appointment right after their meeting time. Mandy wants to make the meeting with her professor.

A: Mandy sets an alarm, so she can get to her appointment on time.
B: Mandy neglects to set an alarm and therefore arrives late to her meeting with the professor.
A.