I think its regard should be capitalized
I think the correct answer from the choices listed above is option B. The thesis statement, or claim, of an argumentative essay should <span>establish the focus of the essay and the writer’s position. What is important in these would be the author's side of the story or what he thinks. So, it should be B. Hope this helps.</span>
You have not given any sentence....
They published a book two years ago.
It is already in past form.