The author sets the tone with his use of signal words. Option C. This is further explained below.
<h3>What are
signal words?</h3>
Generally, Words that assist listeners in following the progression of a discussion are referred to as signal words or transition words.
In conclusion, The author uses signal words in order to establish the tone of the piece. Option C.
Read more about tone (This link defines an author's tone in a passage )
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Answer:Sparta was ruled by two kings while Athens were ruled by archons.
Islam's history on the African continent is rich, more than a millenium of expansion, scholarship, conquest, empire and theological development. ... The historial impact of Islam upon trade, particularly in West Africa, greatly increased the wealth of African people and helped form many great African empires.
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He worked as a president in united states