Answer:
proper thesis, voice, and word tone
Step-by-step explanation:
proper word choice and viewpoint - this is incorrect. Viewpoint is not that important for the good essay itself. A good argumentative essay is based on other qualities that determine if the viewpoint is presented well.
proper voice, tone, and word choice - this is the correct answer. These three elements are key in a good argumentative essay. Because of voice, tone, and word choice, the essay can be convincing and present a good argument. The essay is as good as the formation of the statements is.
proper thesis, voice, and word tone - this is not correct. A proper thesis is important in the argumentative essay based on how it is presented and how convincing it is.
proper thesis and voice - this is not the right answer. The reason is the same as above, proper thesis is not key if there are no other elements.