The answer is A. your last name and page number
In the letter particularly, last name usually put as an introduction before the initial content of the letter, so it will be better if created with header.
For page that contains page number, the header is created to give a pointer on what the page number means/indicates
What passage is it post please
3rd person is writing about someone, 2nd is switching off, and 1st is themselves taking about themselves
The is answer is All of the above
