Answer:
A. Evidence
Explanation:
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An effective argumentative essay must contain a claim that is supported by: evidence.
An argumentative essay is a form of writing that is meant to support a viewpoint. This viewpoint is built up with evidence that can be found in the body of the paragraph.
Therefore, we can conclude that an effective argumentative essay has claims that are backed with pieces of evidence.
Learn more about argumentative essays here:
https://brainly.com/question/11617771
