题目内容：
阅读下列短文，回答题。 "The price of books for our students is just getting higher and higher and, along with the risingcost of tuition ( 学费), it ' s killing these students," said Peter Jason, a college professor．"Remember, students are one of the poorest groups of people in America． Almost half of them have atleast one part-time job． In fact, one of my students has three jobs． And she still manages to have highscores and go to school full-time． "
Textbook prices are usually high． Adding to that problem, many college teachers change textbooks year after year;they either upgrade to a new edition(版本) or change to a different textbook． This furtherhurts students because if a teacher no longer uses a textbook,that book has no resalevalue．
Dr． Jason decided to make life a little easier and a lot cheaper for his students by writing hisown book on public speaking． "Many books have an increased price because of CD-ROMs, lots ofcolor photographs and pictures． I talked to my students, and many of them, like me, prefer to keepthings simple． So, a few years ago, I wrote my own textbook． I made sure that it was simple． Comparedto most of other public speaking books, mine is half the number of pages, and one-third the price．That is $30 instead of $90． When I wrote a second edition last year,students only had to buy the_35new pages． For only $7．00, they had almost a new book． "
What did Dr． Jason say about students at college? A．They are short of money．
B．They need simple books．
C．They have no part-time jobs．
D．They are trying to get high scores．
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