Kiara must send a refusal letter to Ryan, who recently interviewed for a job. Which of the following closings is recommended for a bad-news message?
a. If you had the required five years' experience in social work, we could have included you in the final slate of candidates.
b. We wish you all the best in your job search.
c. If you have any questions, Ryan, please do not hesitate to call me.
d. Again, Ryan, we truly regret being unable to offer you this position.