According to primacy and recency effects, when reading the chapters of the textbook, you are most likely to forget

The correct answer is the information in the middle of the chapter.
This is because the primacy effect refers to something that you've read first, and the recency effect refers to something that you've read last. So the information you got at the beginning and at the end of a chapter will stick with you, whereas you are more likely to forget what happened in the middle.

Abortion would be the most interesting topic to me