I believe the answer is: B.Explains why each event causes the next event to happen
The essasy i just couldn't put it down describe a reason why a lot of people seems to be attached to a certain book to the point where they might spend a lot of time and abandoned their other plans without able to put the book down.
Putting how an event become the cause leading to the next event attract's reader curiosity which make them more likely to flip the pages to find out for more.
