The answer is D. Supporting sentences should "prop up" a topic sentence, while topic sentences should relate to the thesis statement.
A is false because the "base" is the fundamental facts, not the topic sentences.
B is incorrect because a topic sentence is usually at the beginning of the three middle paragraphs.
C is false because a topic sentence should be about one particular aspect of an overall topic, not a large, branching statement.
Hope this helps!
