A supporting detail has the function of literally adding weight to a claim and convincing an audience that the idea being expressed, whatever it may be, is the correct one. It is literally a backing-up technique that will help the writer stress the truthfulness of his/her statement and substracting the possibility of the claim being denied or found untrue. A supporting detail must always be connected to the main idea or claim, otherwise, it might even become a deafeating factor in itself. Because supporting factors are simply a way to add information to a main statement, underline the importance of the main statement, or even prove that the main statement is correct. The correct answer is B. This is because in the case of supporting details, all of them must be related to the main point, or they become just facts and do not add anything to the statement.
