the authors purpose is to inform readers, so therefore it needs to be understandable and clear how to do what the reader went to the source to learn how to do, so, A would be the answer.
hope this helps!
Answer:
How can you be formal?
Explanation:
Always shake hands. Don't interupt. don't call them by their first name unless you are told you can.
The last one- the quote does not refer to any facts or evidence
