A - convince
In an arugument the author is standing a stand for or against something and wants to convince their audience to feel the same way (example: if the author was against smoking, they would try to convince the reader it was bad for you and give reasons why)
The word that could be used to describe the author's purpose in an argument is "convince." Hence, Option A is correct.
There is an easy way to find an argument, and that is to look at the title of the text. From the title, it becomes quite easy to understand the writer's purpose or position. There are certain ways in which an author can present an argument.
The ways that the author uses to present the argument are: reasoning, evidence, and appeal. All the types have their own way of presenting the argument. In the first: a logical explanation; in the second: the author presents statistics, facts, and studies to prove his point.
Therefore, Option A is correct.
Learn more about argument from here:
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