Answer :
Answer:
a. It immediately sets an authoritative tone.
Explanation:
Based on the passage provided within the question and the answers that are listed, it can be said that this affects the passage's tone by immediately setting an authoritative tone. This type of tone indicates that the speaker knows exactly what he is talking about. Which is the case as the speaker/narrator is talking about historical facts or what he believes are facts.
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Answer:
Authoritative tone is correct for all future users.
Explanation: