题目内容：
阅读下列短文，回答题。 It is not easy to become a doctor in the United States． The first step is getting into medical schools． More than 120 American schools offer study programs for people wanting to be doctors．
Advice about medical schools can be got from books and magazines like The,Princeton Review,which provide information about medical schools, study programs and jobs． Competition ( 竞争 ) toenter medical schools is strong． American medical schools have only about 16,000 openings forstudents each year． However, more than two times this many want to enter medical schools．
An important part of their application (申请) is the Medical College Admission Test (MCAT)．The Association of American Medical Colleges provides the test by computer．" It is offered in theUnited States and in other countries． Applicants need to do well on MCAT． They also need a goodrecord in their college studies．
An interview(面试) is also required for entrance to medical schools． The interviewer wants toknow if the applicant understands the demands of life as a medical student and doctor in training． Healso wants to know about the applicant' s goals for a life in medicine．
People who want to become doctors often study a lot of biology,, chemistry or other science． Somestudents work for a year or two in a medical or research job before they attempt to enter medical schools．A medical education can cost a lot,from 15,000 dollars to 40,000 dollars a year or more． Moststudents need to borrow money to pay for the education．
How many people hope to go to medical school in the U． S． each,year? A．More than 32,000．
B．About 24,000．
C．Less than 16,000．
D．About 20,000．
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