I already am going through this. And then, the end question usually tells you to state why you chose your answers for those sub-questions.
I find that a lot of my workbooks in Math have sub-questions that range from A~T letters at most. It's more like the teacher tells you that you only need to do # 1~4, and everyone screams in rejoice that they don't have a lot of homework. And then about halfway into the workbook, you realize it's way more questions than you thought.
This is bull if the teacher ends up giving you hard numbers to work with from the beginning.
And then, they tell you that those types of questions are great comprehension questions. Well, yes, they are, but for worksheets and workbook? It doesn't need to have like 10 sub-questions that have the most annoying numbers to work with.