i still need to pay my mom off from last week . and i need to still buy my summer reading books ( this is the lastest i have ever gotten them ) and i still need to buy jeans . :( i hate jean shopping . all of the pants are really long on me .

OPTIONS:
-- They need them for class .
-- They believe the books will be banned soon .
-- They enjoy reading .
-- They love to read .
Answer the following question: Why is the narrator worried about buying books ?
They need them for class .