Which is true about supporting details? (A) Questionable details provide the strongest support for an author’s main idea. (B) Irrelevant details are unrelated to the point the author is making. (C) Essential details are those that do not directly support an author’s main point. (D) A good reader does not distinguish between relevant and irrelevant details
The statement that is true about supporting details is option B. Irrelevant details are unrelated to the point the author is making. A paragraph always includes the main sentence and its supporting details. Supporting details are details that aim to "support" the main sentence. Therefore, these should be relevant to the topic. Irrelevant details should be avoided to avoid confusion to the readers.