The correct answer that completes the list of narrative text elements is resolution. Every text needs an ending that fits the story and its conflict or problem. The resolution helps the reader to understand how the conflict was solved. Even though some stories have an open ending, there are always minor resolutions that help the reader imagine the possible ending.
I would choose A and B because you need and main idea about the product and you also need a major detail about the product. I am not sure I just says what I think it is important. Like if it help
