Answer:
The correct answer would be option a: "It helps engage readers, because they want to know what happens in the story".
Step-by-step explanation:
Adding that type of foreshadowing, generates curiosity and excitement in the readers, and that causes them to want to know what will happen, it doesn't seem like fiction since it is real so option b is incorrect. It could confuse certain people, but it is not common, so option c is also incorrect. It doesn't include much more facts, and those that are included aren't clear, so it doesn't seem more trustworthy, so option d is also incorrect.