An effective argumentative essay must provide evidence because a. evidence appeals to the reader's sense of logic. b. the evidence will be used to support the counterclaim. c. a conclusion cannot be made without it. d. it explains the source of the claim.

A.evidence appeals to the reader's sense of logic. 

In order to properly appeal to an audience, the writer needs to use well-researched information in their argument. Otherwise, the argument will only be based off of personal experience, stories, and emotional evidence. This is not enough to completely convince a reader.

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