Janice, a third-year undergraduate student, joins a publication house as a temporary employee for a period of 2 months to gain work experience. At the end of this period, based on her work, she is offered a permanent position in the organization. Considering that Janice is still a student, she is offered a contract that would be effective upon graduation. Janice confirms to the publication house that she will take up the permanent position as soon as she graduates. The given scenario is an example of .