Blogs are not reviewed unlike other news sources. Bloggers simply speak their mind and take on an issue. While what they say may be supported by facts, we can never be sure of such. It is therefore recommend to refrain from using blog sources, unless these are from certain credible projects and programs and the alike. Thus, B may be the best answer.
<span>it was a collection of proverbs passed on from teacher to student
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The best answer choice for the definition of a topic sentence opposed to a main idea is going to be: C. A topic sentence is the central idea of a paragraph, while a main idea is the central idea of an entire text. I hope that answers your question.