Facts is the evidence that the author primarily use to support his claim that Zimmermann was the first to make a simple encryption product
<h3>What is meant by facts?</h3>
Facts are the reality check about the things that are written in the book by the writer. Facts are very knowledgeable for the people as with the help of fact, people learn and understand about different things. Facts cannot be fake written.
Thus, option A is correct.
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