It is an indefinite pronoun.
A word that takes the place of another noun for an unknown or unnamed number of people.
Hello. This question requires a personal answer, where you must present your own opinions about the educational system. However, to help you out, I'll show you how I would answer that question. I hope this answer can serve as a model for your answer.
From my point of view, our current educational system has not been effective in preparing students for life. This is because our educational system is very traditional, and uses a structure where students are motivated to memorize concepts in order to get a good grade on the tests. This act of memorizing is very harmful to students, as these concepts are quickly forgotten after the tests are administered. Our educational system has failed to stimulate debate and discussion about the issues presented in the classroom. These debates and discussions allow students to be more participatory and learn the concepts rather than memorize them. Learning the concepts is much more beneficial because it allows them to remain with the student forever.
The treasure chest was like a open clam holding a shining pearl, giving off the soft glow of wealth.
Hope this helps! :)
It would be b because it makes a lot more sense
D because if your previewing it your obviously going to look at the title and bold words and comments made by others but you would not look at the chapter subheadings