Answer:
a. by moving the last sentence closer to the beginning
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Calpurnia's cot shows how segregation is everywhere in Maycomb, including the Finch home.
We know that Aunt Alexandra has somewhere to sleep when she stays with them, suggesting that they have a spare bedroom. However, when Calpurnia stays with the Finches, she is not allowed to stay in the spare room.
Answer:
c Appeals to Authority
Explanation:
The sentence of the question is using the fallacy of appeal to authority. This fallacy establishes that something is valid only because an authority in the field says so.
In the sentence, the person will use Colgate simply because the dentist told him to do so. While this is not necessarily an unvalid reason, it would be best if the person found out by himself whether Colgate is the best toothpaste option for him or not.