Which of the following statements is true according Paragraph three？A．College students hav

Which of the following statements is true according Paragraph three？

A．College students have to pay more for textbooks than four years ago.

B．The NACS hardly encourages students to use used books or rent texts.

C．The annual tuition of college students has been declining slowly.

D．$655 for textbooks is a big sum compared to the annual tuition.

请帮忙给出正确答案和分析，谢谢！