I think the answer is the reason for his absence is quite simple to understand.
C because most of that what they talk about and if I’m wrong I’m sorry but you went and asked and I answered the question of what I thought
I conclusion paragraph always start with a word Thus, I conclude, Therefore, and many more. Avoid beginning with an unnecessary, overused phrase such as "in conclusion" and "in summary" or "in closing". I hope you are satisfied with my answer and feel free to ask for more
Answer:
why writing a letter why not giving us tips