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
Answer: Slaves were whipped for falling short of their cotton picking quotas.
Explanation: This answer can be found in Chapter 13 of <em>"From twelve years a slave"</em>
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Answer:
This author is credited with being the first Imagist poet:
Ezra Pound