I can hello if you give me the choices.
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
C is the answer some may say otherwise but the key word(s) that make it an opinion to be argued are; inadequate. That word is a big red flag showing its an opinion. not all people think Rhodes so called small gestures are inadequate.
