The setting of collecting infant books and selling used books differs because one is at the school and the other is at the mall, as shown in option B.
The setting is very important to give the reader a location and allow a better understanding of the text.
The setting to which your question refers corresponds to a text where students promote a collection of children's books to send them to a school in Uganda. This collection is done inside the school, where students place collection points and wait for book donations.
These students decide to sell used books at the mall and use the money to generate publicity for the collection of children's books.
More information about the setting is in the link:
https://brainly.com/question/15367590