Final answer:
Lin should write the job offer letter with a professional and enthusiastic tone, using polite and courteous language, a clear subject line, proper salutation, and a formal closing.
Step-by-step explanation:
Lin, a department head, is tasked with writing a job offer letter to a candidate. The tone of this communication should be both professional and enthusiastic. This means Lin should maintain a level of formality, reflecting thoughtfulness and fairness, while also conveying excitement about the candidate joining the team. Since the first impression is crucial, the tone must be polite and courteous, without resorting to casual language or humor, which could be misunderstood in written form.
In addition to tone, Lin should ensure that the letter has a clear subject line and opens with a proper salutation using the person's title. The introduction should clearly state the purpose of the letter - offering the job position. Language should be clear, concise, and to the point, avoiding any text language or extreme informality that would not be appropriate in professional business communication. Lastly, the closing of the letter should include a polite line and a professional complimentary close, followed by Lin's typed full name.