Final answer:
The best topic sentence among the choices given is: 'Consumers should learn to read their mail carefully.' This sentence clearly states the main idea and can be expanded upon in the paragraph.
Step-by-step explanation:
The best topic sentence among the choices given is: Consumers should learn to read their mail carefully.
A topic sentence should clearly state the main idea or focus of the paragraph, and the sentence 'Consumers should learn to read their mail carefully' does just that. It introduces the idea of consumer responsibility in reading mail carefully, which can be expanded upon in the paragraph. Additionally, it is a complete sentence and not a fragment or question like the other choices.
By using this topic sentence, the author can then provide supporting details and examples about why it is important for consumers to read their mail carefully, such as avoiding scams, understanding offers, and making informed decisions.
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