Final answer:
Everett must consider the D) rhetorical situation and the purpose of his argumentative research essay, as these components are central to forming a persuasive argument that is tailored to his intended audience.
Step-by-step explanation:
Everett considers the rhetorical situation; in doing so, he ensures that he knows and understands the purpose of the essay as well as its intended audience. The rhetorical situation encompasses the context of the communication act, which in an argumentative essay, would involve the purpose, audience, stance, and context. Everett's awareness of the rhetorical situation provides crucial guidance for how he constructs his argument, assesses evidence, and appeals to his readers.
Recognizing the purpose of the essay guides Everett to focus on the central thesis and to ensure all parts of his writing serve to advance this main argument. And by considering the intended audience, Everett can tailor his language, evidence, and rhetorical appeals (ethos, logos, pathos) to persuade his readers effectively.
The correct answer to the fill-in-the-blank question is therefore D. rhetorical situation; purpose. This consideration is essential for any writer embarking on an argumentative research essay because it affects every other aspect of the writing, including the types of evidence presented, the tone of the writing, and the overall structure of the argument.