阅读下面的短文，从每题所给的四个选项(A、B、C、D)中，选出最佳选项。
E
The cost of medical care in the United States is very high. The time and money that doctors spend on their medical education is probably one reason for this problem.
A visit to a doctor's office costs from fifteen to fifty dollars. It is almost impossible for people to pay for medical care they need. Many people in the United States think that doctors are overpaid. Most doctors, however, disagree. They say that they have been required to study medicine for a long time. Tuition(学费)for many years of medical education costs lots of money. Doctors say that it is necessary for most medical students to borrow money from a bank to pay their tuition. Because this money must be repaid to the bank, young doctors need to receive a lot of money for their work. So they charge(收费)people high prices for medical care.
Therefore, it's possible that the high cost of medical care in America is unnecessary. Because high tuition is one cause of high costs, one way to lower costs would be to have medical schools that are free or have low tuition.
Some people don't have their medical care they need because________.

A．they are not willing to pay the doctors high tuition

B．they don't think it necessary to have medical care

C．they don't want to spend much money on it

D．they haven't got enough money to pay for it

The reason for the high medical cost mentioned(提到)in the article is________.

A．tuition in medical schools is high

B．the price of medicine is high

C．doctors are overpaid

D．doctors must pay money to banks

One way to lower the cost of medical care would be________.

A．not to see a doctor

B．to pay doctors less money

C．to let medical students have free or partly free medical education

D．to forbid(禁止)doctors to ask their patients for too much money

The main idea of the article is that________.

A．a visit to a doctor's office may cost as much as 15 to 50 in US

B．the cost of medical care is the main reason for the high costs in US

C．medical care in the United States costs a lot of money because doctors want to be rich

D．the high cost of tuition in medical schools is one reason for the high cost of medical care in America