WHAT IS THE MAIN IDEA OF THIS PASSAGE

24. What is the main idea of this passage? A. Elizabeth Blackwell overcame serious obstacles to become the first woman doctor in the United States. B. Elizabeth Blackwell had to abandon her plans to become a doctor because of an eye infection. C. Elizabeth Blackwell taught music to pay for her medical studies D. Elizabeth Blackwell founded the first medical school for women. B. Choose one option - A, B, C or D - that best fits each of the numbered blanks. It can be shown in facts and figures that cycling is the cheapest, most convenient, and most environmentally desirable form of transport in towns, but such cold calculations do not mean much on a frosty winter morning. The real appeal of cycling is that it is so (25)______. It has none of the difficulties and tensions of other ways of travelling, so you are more cheerful after a ride, even through the rush hour. The first thing a non-cyclist says to you is: "But isn't it (26)______ dangerous?" It would be foolish to deny the danger of sharing the road with motor vehicles and it must be admitted that there are an alarming (27)______ of accidents involving cyclists. However, although police records (28)______ that the car driver is often to blame, the answer lies with the cyclist. It is possible to ride in such a way as to reduce risks to a minimum.