阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
It’s roughly estimated that there are 450 million disabled people in the world. No one knows exactly how many disabled people there are in the world.The number of disabled people in India alone is probably more than double the total population of Canada.
In the United Kingdom, about one in ten people have some disability. Disability is not just something that happens to other people: as we get older, many of us will become less mobile, hard of hearing or have failing eyesight.
Disablement can take many forms and occur at any time of life. Some people are born with disabilities. Many others become disabled as they get older. There are many progressive disabling diseases. The longer time goes on, the worse they become. Some people are disabled in accidents. Many others may have a period of disability in the form of a mental illness. All are affected by people's attitude towards them.
