Respuesta :
The thing that should be added to the paragraph to make the writer’s argument more effective is C. the author’s viewpoint.
An author's viewpoint simply means the way an author looks at a topic. It's the author point of view or perspective of the author.
In order to make the writer’s argument more effective, the author’s viewpoint should be added. This is vital on knowing how the author feels about the topic.
Learn more about viewpoints on:
https://brainly.com/question/25718784