The true statement is that identifying the main idea of a text can help you understand the text better. Actually, that is the one of the most important assets in reading. When you realize the main idea, you will be able to understand all the details in the right way, and the details are always meant to support the main idea. The main idea can be supported by expert, especially if the writer is not an expert on the subject. It is also important to be aware that main idea is not always directly stated in narrative text, and that sometimes we have to read between the lines.